diff --git a/TODO.md b/TODO.md
new file mode 100644
index 0000000..5b0109f
--- /dev/null
+++ b/TODO.md
@@ -0,0 +1,26 @@
+# What to do for the 2D Engine
+
+### Todo
+
+- [ ] Create tilemap management and display
+  - [ ] Find tilemap building format
+  - [ ] Add building support for tilemaps in asset builder
+  - [ ] Add loading support in asset manager
+  - [ ] Display tilemaps
+    - [ ] Work on optimizations !
+  - [ ] Create camera
+
+- [ ] Create entities management
+  - [ ] Find entities building format
+  - [ ] Add building support for entities in asset builder
+  - [ ] Add loading support in asset manager
+
+- [ ] Change the way default values are defined across components and systems
+  - [ ] Remove the need of a dummy texture
+
+### In progress
+
+
+### Done
+
+- [x] Work on linked lists optimizations
diff --git a/assets/Makefile b/assets/Makefile
index 8eb069d..4559620 100644
--- a/assets/Makefile
+++ b/assets/Makefile
@@ -1,4 +1,5 @@
 ASSETS := \
+  misc/dummy_sheet.png \
   player_sheets/player_idle_sheet.png \
   player_sheets/player_walk_sheet.png \
   player_sheets/player_run_sheet.png\
diff --git a/assets/misc/dummy_sheet.png b/assets/misc/dummy_sheet.png
new file mode 100644
index 0000000..1e92bfb
Binary files /dev/null and b/assets/misc/dummy_sheet.png differ
diff --git a/assets/player_sheets/player_run_sheet.png b/assets/player_sheets/player_run_sheet.png
index c57edda..ae54099 100644
Binary files a/assets/player_sheets/player_run_sheet.png and b/assets/player_sheets/player_run_sheet.png differ