diff --git a/src/assets/tiled/first.tmx b/src/assets/tiled/first.tmx
index 12ed9a9..db04b68 100644
--- a/src/assets/tiled/first.tmx
+++ b/src/assets/tiled/first.tmx
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<map version="1.10" tiledversion="1.11.2" orientation="orthogonal" renderorder="right-down" width="20" height="15" tilewidth="8" tileheight="8" infinite="0" nextlayerid="2" nextobjectid="1">
+<map version="1.10" tiledversion="1.11.2" orientation="orthogonal" renderorder="right-down" width="20" height="15" tilewidth="8" tileheight="8" infinite="0" nextlayerid="3" nextobjectid="1">
  <tileset firstgid="1" source="tileset.tsx"/>
- <layer id="1" name="Tile Layer 1" width="20" height="15">
+ <layer id="1" name="Actors" width="20" height="15">
   <data encoding="csv">
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
@@ -9,7 +9,7 @@
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,5,0,0,0,41,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
@@ -18,6 +18,28 @@
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+</data>
+ </layer>
+ <layer id="2" name="Walls" width="20" height="15">
+  <properties>
+   <property name="solid" type="bool" value="true"/>
+  </properties>
+  <data encoding="csv">
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,1,2,2,2,2,2,2,2,2,4,0,0,0,0,0,0,
+0,0,0,0,17,0,0,0,0,0,0,0,0,20,0,0,0,0,0,0,
+0,0,0,0,17,0,0,0,0,0,0,0,0,20,0,0,0,0,0,0,
+0,0,0,0,17,0,0,0,0,0,0,0,0,20,0,0,0,0,0,0,
+0,0,0,0,17,0,0,0,0,0,0,0,0,20,0,0,0,0,0,0,
+0,0,0,0,17,0,0,0,0,0,0,0,0,20,0,0,0,0,0,0,
+0,0,0,0,17,0,0,0,0,0,0,0,0,20,0,0,0,0,0,0,
+0,0,0,0,83,2,2,68,2,2,2,37,67,36,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
 </data>
  </layer>
 </map>
diff --git a/src/assets/tiled/main.tiled-session b/src/assets/tiled/main.tiled-session
index ebbdeba..036a136 100644
--- a/src/assets/tiled/main.tiled-session
+++ b/src/assets/tiled/main.tiled-session
@@ -28,6 +28,7 @@
     "recentFiles": [
         "first.tmx"
     ],
+    "textEdit.monospace": true,
     "tileset.lastUsedFormat": "tsx",
     "tileset.tileSize": {
         "height": 8,
diff --git a/src/assets/tiled/tileset.tsx b/src/assets/tiled/tileset.tsx
index 70adfea..2522770 100644
--- a/src/assets/tiled/tileset.tsx
+++ b/src/assets/tiled/tileset.tsx
@@ -1,4 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <tileset version="1.10" tiledversion="1.11.2" name="tileset" tilewidth="8" tileheight="8" tilecount="160" columns="16">
  <image source="../kenney-micro-roguelike/colored_tilemap_packed.png" width="128" height="80"/>
+ <tile id="4">
+  <properties>
+   <property name="type" value="player"/>
+  </properties>
+ </tile>
+ <tile id="40">
+  <properties>
+   <property name="type" value="pot"/>
+  </properties>
+ </tile>
 </tileset>
diff --git a/src/entity.zig b/src/entity.zig
index b3b3aa5..b3ebe1d 100644
--- a/src/entity.zig
+++ b/src/entity.zig
@@ -12,7 +12,9 @@ pub const Id = List.Id;
 
 pub const Type = enum {
     nil,
-    player
+    player,
+    solid,
+    pot,
 };
 
 type: Type,
diff --git a/src/game.zig b/src/game.zig
index 4390668..be19d79 100644
--- a/src/game.zig
+++ b/src/game.zig
@@ -25,34 +25,58 @@ pub const Input = struct {
     move_down: Window.KeyState,
     move_left: Window.KeyState,
     move_right: Window.KeyState,
+    restart: bool
 };
 
-const tile_size = Vec2.init(8, 8);
+pub const Level = struct {
+    entities: Entity.List,
+    timers: Timer.List,
+
+    pub const empty = Level{
+        .entities = .empty,
+        .timers = .empty
+    };
+
+    pub fn clone(self: *Level, gpa: Allocator) !Level {
+        var entities = try self.entities.clone(gpa);
+        errdefer entities.deinit(gpa);
+
+        var timers = try self.timers.clone(gpa);
+        errdefer timers.deinit(gpa);
+
+        return Level{
+            .entities = entities,
+            .timers = timers
+        };
+    }
+
+    pub fn deinit(self: *Level, gpa: Allocator) void {
+        self.entities.deinit(gpa);
+        self.timers.deinit(gpa);
+    }
+};
 
 canvas_size: Vec2,
-entities: Entity.List,
-timers: Timer.List,
+level: Level,
+
+current_level: u32,
+levels: std.ArrayList(Level),
 
-last_move: Vec2,
 last_up_repeat_at: ?f64 = null,
 last_down_repeat_at: ?f64 = null,
 last_left_repeat_at: ?f64 = null,
 last_right_repeat_at: ?f64 = null,
 
-pub fn init(gpa: Allocator) !Game {
-    var game = Game{
-        .canvas_size = (Vec2.init(20, 15)).multiply(tile_size),
-        .entities = .empty,
-        .timers = .empty,
-        .last_move = .init(0, 0)
-    };
-    errdefer game.deinit(gpa);
+show_grid: bool = false,
 
-    _ = try game.entities.insert(gpa, .{
-        .type = .player,
-        .position = .init(0, 0),
-        .render_tile = .{ .id = .player },
-    });
+pub fn init(gpa: Allocator) !Game {
+    var self = Game{
+        .canvas_size = (Vec2.init(20, 15)),
+        .level = .empty,
+        .levels = .empty,
+        .current_level = 0,
+    };
+    errdefer self.deinit(gpa);
 
     const manager = try tiled.ResourceManager.init();
     defer manager.deinit();
@@ -62,6 +86,24 @@ pub fn init(gpa: Allocator) !Game {
     const map = try manager.loadMapFromBuffer(@embedFile("assets/tiled/first.tmx"));
     defer map.deinit();
 
+    try self.levels.append(gpa, try loadLevelFromTiled(gpa, map));
+    try self.restartLevel(gpa);
+
+    return self;
+}
+
+fn restartLevel(self: *Game, gpa: Allocator) !void {
+    const level_copy = try self.levels.items[self.current_level].clone(gpa);
+    errdefer level_copy.deinit(gpa);
+
+    self.level.deinit(gpa);
+    self.level = level_copy;
+}
+
+fn loadLevelFromTiled(gpa: Allocator, map: tiled.Map) !Level {
+    var level: Level = .empty;
+    errdefer level.deinit(gpa);
+
     var layer_iter = map.iterLayers();
     while (layer_iter.next()) |layer| {
         if (layer.layer.visible == 0) {
@@ -71,31 +113,127 @@ pub fn init(gpa: Allocator) !Game {
             continue;
         }
 
+        const layer_props = tiled.Properties{ .inner = layer.layer.properties };
+        const is_layer_solid = layer_props.getPropertyBool("solid") orelse false;
+
         const map_width = map.map.width;
         for (0..map.map.height) |y| {
             for (0..map_width) |x| {
 
                 const tile = map.getTile(layer, x, y) orelse continue;
+                const tile_props = tiled.Properties{ .inner = tile.tile.properties };
+                const tile_type: []const u8 = std.mem.span(tile_props.getPropertyString("type") orelse "");
 
-                if (tile.getPropertyString("type")) |tile_type| {
-                    _ = tile_type; // autofix
+                const tile_size = Vec2.init(8, 8);
+                var entity: Entity = .{
+                    .type = .nil,
+                    .position = Vec2.init(@floatFromInt(x), @floatFromInt(y)),
+                    .render_tile = .{ .position = tile.getUpperLeft().divide(tile_size) },
+                };
+                if (std.mem.eql(u8, tile_type, "player")) {
+                    entity.type = .player; 
+                } else if (std.mem.eql(u8, tile_type, "pot")) {
+                    entity.type = .pot; 
+                } else if (is_layer_solid) {
+                    entity.type = .solid; 
                 }
 
-                _ = try game.entities.insert(gpa, .{
-                    .type = .nil,
-                    .position = Vec2.init(@floatFromInt(x), @floatFromInt(y)).multiply(tile_size),
-                    .render_tile = .{ .position = tile.getUpperLeft().divide(tile_size) },
-                });
+                _ = try level.entities.insert(gpa, entity);
             }
         }
     }
 
-    return game;
+    return level;
 }
 
 pub fn deinit(self: *Game, gpa: Allocator) void {
-    self.entities.deinit(gpa);
-    self.timers.deinit(gpa);
+    self.level.deinit(gpa);
+    for (self.levels.items) |*level| {
+        level.deinit(gpa);
+    }
+    self.levels.deinit(gpa);
+}
+
+fn drawGrid(self: *Game, size: Vec2, color: Vec4, line_width: f32) void {
+    var x: f32 = 0;
+    while (x < self.canvas_size.x) {
+        x += size.x;
+        Gfx.drawLine(
+            .init(x, 0),
+            .init(x, self.canvas_size.y),
+            color,
+            line_width
+        );
+    }
+
+    var y: f32 = 0;
+    while (y < self.canvas_size.y) {
+        y += size.y;
+        Gfx.drawLine(
+            .init(0, y),
+            .init(self.canvas_size.x, y),
+            color,
+            line_width
+        );
+    }
+}
+
+fn getEntityAt(self: *Game, pos: Vec2) ?Entity.Id {
+    var iter = self.level.entities.iterator();
+    while (iter.next()) |tuple| {
+        const entity = tuple.item;
+        if (entity.position.eql(pos)) {
+            return tuple.id;
+        }
+    }
+
+    return null;
+}
+
+fn isSolidAt(self: *Game, pos: Vec2) bool {
+    if (self.getEntityAt(pos)) |entity_id| {
+        const entity = self.level.entities.getAssumeExists(entity_id);
+        return entity.type == .solid;
+    }
+
+    return false;
+}
+
+fn canMove(self: *Game, entity: *Entity, dir: Vec2) bool {
+    const next_pos = entity.position.add(dir);
+    if (self.isSolidAt(next_pos)) {
+        return false;
+    }
+    if (next_pos.x < 0 or next_pos.x >= self.canvas_size.x) {
+        return false;
+    }
+    if (next_pos.y < 0 or next_pos.y >= self.canvas_size.y) {
+        return false;
+    }
+
+    return true;
+}
+
+fn moveEntity(self: *Game, entity: *Entity, dir: Vec2) bool {
+    if (entity.type == .solid) {
+        return false;
+    }
+
+    if (dir.x == 0 and dir.y == 0) {
+        return true;
+    }
+
+    const next_pos = entity.position.add(dir);
+    if (self.getEntityAt(next_pos)) |next_entity_id| {
+        const next_entity = self.level.entities.getAssumeExists(next_entity_id);
+        if (!self.moveEntity(next_entity, dir)) {
+            return false;
+        }
+    }
+
+    entity.position = next_pos;
+
+    return true;
 }
 
 pub fn getInput(self: *Game, window: *Window) Input {
@@ -109,45 +247,27 @@ pub fn getInput(self: *Game, window: *Window) Input {
         .move_down = window.getKeyState(.S),
         .move_left = window.getKeyState(.A),
         .move_right = window.getKeyState(.D),
+        .restart = window.isKeyPressed(.R)
     };
 }
 
-fn drawGrid(self: *Game, size: Vec2, color: Vec4) void {
-    var x: f32 = 0;
-    while (x < self.canvas_size.x) {
-        x += size.x;
-        Gfx.drawLine(
-            .init(x, 0),
-            .init(x, self.canvas_size.y),
-            color,
-            1
-        );
-    }
-
-    var y: f32 = 0;
-    while (y < self.canvas_size.y) {
-        y += size.y;
-        Gfx.drawLine(
-            .init(0, y),
-            .init(self.canvas_size.x, y),
-            color,
-            1
-        );
-    }
-}
-
 pub fn tick(self: *Game, input: Input) !void {
     Gfx.drawRectangle(.init(0, 0), .init(self.canvas_size.x, self.canvas_size.y), rgb_hex("#222323").?);
-    self.drawGrid(tile_size, rgb(20, 20, 20));
+    if (self.show_grid) {
+        self.drawGrid(.init(1, 1), rgb(20, 20, 20), 0.1);
+    }
 
-    self.timers.now += input.dt;
+    if (input.restart) {
+        try self.restartLevel(input.allocator);
+    }
+
+    self.level.timers.now += input.dt;
 
     var move: Vec2 = .init(0, 0);
-    defer self.last_move = move;
 
     const repeat_options = Window.KeyState.RepeatOptions{
-        .first_at = 0.4,
-        .period = 0.2
+        .first_at = 0.3,
+        .period = 0.1
     };
 
     if (input.move_up.pressed or input.move_up.repeat(&self.last_up_repeat_at, repeat_options)) {
@@ -163,18 +283,16 @@ pub fn tick(self: *Game, input: Input) !void {
         move.x += 1;
     }
 
-    var iter = self.entities.iterator();
+    var iter = self.level.entities.iterator();
     while (iter.nextItem()) |entity| {
         if (entity.type == .player) {
-            // const velocity = input.move.multiplyScalar(100);
-            // entity.position = entity.position.add(velocity.multiplyScalar(input.dt));
-            entity.position = entity.position.add(move.multiply(tile_size));
+            _ = self.moveEntity(entity, move);
         }
 
         if (entity.render_tile) |render_tile| {
             switch (render_tile) {
-                .id => |tile_id| Gfx.drawTileById(tile_id, entity.position, tile_size, rgb(255, 255, 255)),
-                .position => |position| Gfx.drawTile(position, entity.position, tile_size, rgb(255, 255, 255)),
+                .id => |tile_id| Gfx.drawTileById(tile_id, entity.position, .init(1,1), rgb(255, 255, 255)),
+                .position => |position| Gfx.drawTile(position, entity.position, .init(1,1), rgb(255, 255, 255)),
             }
         }
     }
@@ -190,6 +308,7 @@ pub fn debug(self: *Game) !void {
     }
     defer imgui.endWindow();
 
-    imgui.textFmt("Entities: {}", .{self.entities.len});
-    imgui.textFmt("Timers: {}", .{self.timers.array_list.len});
+    imgui.textFmt("Entities: {}", .{self.level.entities.len});
+    imgui.textFmt("Timers: {}", .{self.level.timers.array_list.len});
+    _ = imgui.checkbox("Show grid", &self.show_grid);
 }
diff --git a/src/generational_array_list.zig b/src/generational_array_list.zig
index 3d49e69..52befe7 100644
--- a/src/generational_array_list.zig
+++ b/src/generational_array_list.zig
@@ -300,6 +300,26 @@ pub fn GenerationalArrayList(Item: type) type {
             allocator.free(self.items[0..self.capacity]);
         }
 
+        pub fn clone(self: *Self, allocator: Allocator) !Self {
+            const items = try allocator.dupe(Item, self.items[0..self.capacity]);
+            errdefer allocator.free(items);
+
+            const generations = try allocator.dupe(Generation, self.generations[0..self.capacity]);
+            errdefer allocator.free(generations);
+
+            const unused = try allocator.dupe(u8, self.unused[0..divCeilGeneration(self.capacity)]);
+            errdefer allocator.free(unused);
+
+            return Self{
+                .items = items.ptr,
+                .generations = generations.ptr,
+                .unused = unused.ptr,
+                .len = self.len,
+                .count = self.count,
+                .capacity = self.capacity
+            };
+        }
+
         pub fn getMetadata(self: *Self) Metadata {
             return Metadata{
                 .len = self.len,
diff --git a/src/tiled.zig b/src/tiled.zig
index 616058d..58700ba 100644
--- a/src/tiled.zig
+++ b/src/tiled.zig
@@ -63,18 +63,6 @@ pub const ResourceManager = struct {
 pub const Tile = struct {
     tile: *c.tmx_tile,
 
-    pub fn getPropertyString(self: Tile, key: [*:0]const u8) ?[*:0]const u8 {
-        const maybe_prop = c.tmx_get_property(self.tile.properties, key);
-        if (maybe_prop == null) {
-            return null;
-        }
-        const prop: *c.tmx_property = maybe_prop.?;
-        if (prop.type != c.PT_STRING) {
-            return null;
-        }
-        return prop.value.string;
-    }
-
     pub fn getUpperLeft(self: Tile) Vec2 {
         return Vec2.init(
             @floatFromInt(self.tile.ul_x),
@@ -152,4 +140,38 @@ pub const Layer = struct {
     };
 };
 
+pub const Properties = struct {
+    inner: ?*c.tmx_properties,
+
+    pub fn getPropertyString(self: Properties, key: [*:0]const u8) ?[*:0]const u8 {
+        const inner = self.inner orelse return null;
+
+        const maybe_prop = c.tmx_get_property(inner, key);
+        if (maybe_prop == null) {
+            return null;
+        }
+        const prop: *c.tmx_property = maybe_prop.?;
+        if (prop.type != c.PT_STRING) {
+            return null;
+        }
+        return prop.value.string;
+    }
+
+    pub fn getPropertyBool(self: Properties, key: [*:0]const u8) ?bool {
+        const inner = self.inner orelse return null;
+
+        const maybe_prop = c.tmx_get_property(inner, key);
+        if (maybe_prop == null) {
+            return null;
+        }
+
+        const prop: *c.tmx_property = maybe_prop.?;
+        if (prop.type != c.PT_BOOL) {
+            return null;
+        }
+
+        return prop.value.boolean != 0;
+    }
+};
+
 pub const FLIP_BITS_REMOVAL: u32 = c.TMX_FLIP_BITS_REMOVAL;
diff --git a/src/timer.zig b/src/timer.zig
index 1b67a7f..4460617 100644
--- a/src/timer.zig
+++ b/src/timer.zig
@@ -32,6 +32,16 @@ pub const List = struct {
         self.array_list.deinit(gpa);
     }
 
+    pub fn clone(self: *List, gpa: Allocator) !List {
+        const array_list = try self.array_list.clone(gpa);
+        errdefer array_list.deinit(gpa);
+
+        return List{
+            .now = self.now,
+            .array_list = array_list
+        };
+    }
+
     pub fn start(self: *List, gpa: Allocator, opts: Options) !Id {
         assert(opts.duration > 0);
         return try self.array_list.insert(gpa, .{