diff --git a/src/mock.rs b/src/mock.rs
index f49a494..b3021f1 100644
--- a/src/mock.rs
+++ b/src/mock.rs
@@ -1,4 +1,4 @@
-pub(crate) mod image {
+pub mod image {
     use crate::image::Image;
 
     pub fn _bg() -> Image {
@@ -66,7 +66,7 @@ pub(crate) mod image {
     }
 }
 
-pub(crate) mod palette {
+pub mod palette {
     use crate::{Palette, Colour};
 
     pub(crate) fn default() -> Palette {
@@ -80,7 +80,7 @@ pub(crate) mod palette {
         }
     }
 
-    pub(crate) fn soup11() -> Palette {
+    pub fn soup11() -> Palette {
         Palette {
             name: "soup11".into(),
             colours: vec![
@@ -100,10 +100,10 @@ pub(crate) mod palette {
     }
 }
 
-pub(crate) mod scenes {
+pub mod scenes {
     use crate::Scene;
 
-    pub(crate) fn zero() -> Scene {
+    pub fn zero() -> Scene {
         Scene {
             name: "zero".into(),
             background: vec![
@@ -145,3 +145,65 @@ pub(crate) mod scenes {
         }
     }
 }
+
+pub mod entities {
+    use crate::Entity;
+
+    pub fn bitsy_avatar() -> Entity {
+        Entity {
+            name: "".to_string(),
+            image: "avatar".to_string(),
+            tags: vec!["player".into()]
+        }
+    }
+
+    pub fn bitsy_cat() -> Entity {
+        Entity {
+            name: "cat".to_string(),
+            image: "cat".to_string(),
+            tags: vec![]
+        }
+    }
+}
+
+pub mod tiles {
+    use crate::Tile;
+
+    pub fn bitsy_block() -> Tile {
+        Tile {
+            name: "block".into(),
+            images: vec!["block".into()],
+            wall: false
+        }
+    }
+}
+
+pub mod game {
+    use crate::{Config, Game};
+
+    pub fn bitsy() -> Game {
+        Game {
+            config: Config {
+                name: Some("Write your game's title here".into()),
+                width: 16,
+                height: 16,
+                tick: 400,
+                starting_room: None,
+                version: (0, 1)
+            },
+            entities: vec![
+                crate::mock::entities::bitsy_avatar(),
+                crate::mock::entities::bitsy_cat(),
+            ],
+            images: vec![],
+            palettes: vec![],
+            scenes: vec![
+                crate::mock::scenes::zero(),
+            ],
+            tiles: vec![
+                crate::mock::tiles::bitsy_block(),
+            ],
+            music: vec![]
+        }
+    }
+}