Pixel art to do (by priority):
  - 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
   crimson_bat
   gunslinger/Reloading
   gb_gunslinger
   master_gunslinger
   tifucile
   washing_machine
Unused items:
   chest
Unused skills:
   launch
   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?!