update TODO list

TODO

@@ -1,3 +1,10 @@
+Pixel art to do (by priority):
+  - Add-in icon
+  - More varied attacks: circular slash? dash attack?
+  - Environment damage
+  - Particles after monsters' deaths? Slime puddles, dark enemy outlines, ...
+  - Enemies planned (skeletons; more tifuciles; a final boss for Crypt GLOOM?)
+
 Unused enemies:
    water_slime
    chemical_slime
@@ -14,3 +21,24 @@ Unused skills:
    magic
 Unused animations:
   items/upgrade
+
+* Have camera move (eg. in the direction of movement)
+* More explosions
+* Cool-looking shaders?
+* Leaves particles on monsters' death
+* Leaves environment damage after spells and explosions
+* Thorned dash
+
+* Mini cutscenes?
+
+* Bonemeal easter egg (grow plants wherever skeletons die)
+* Also the other easter egg
+
+* More variety in the moveset: circular attack, dash attack
+* Elaborate AIs that force the player to move and adapt, not just mash
+* Buffed gunslingers with bullet hell vibes
+* Arcade gameplay: add score and marks based on health lost, time spent, etc
+  - Make loot drops and spawn locations deterministic
+  - Large graphics for combos etc
+
+* Tutorial?!