I played the JAM version:
I feel like playing a 3D game with a forced 64x64 render. The result is between originality and illegibility. This adds an unique style to the game, but I find hard to see some elements in the game (for example, platforms).
The game is fun by the way! Nice level design. But I think that you can add more feedback when the player shoots enemies (there is no sound or effect in this version).