The gameplay is enjoyable once you learn the ropes.
2D background with 3D characters work's well here.
Jump should be on 'W', if up is not for looking up with the character - it should by jump. So many people place jumping on 'Space' in 2D games when it should be on up, up is jump. At least add it to 'W' as well as 'Space' since you don't have time to implement keybinding (this is a game jam).
Would have been better if there was some music and better sound effects, these current ones sound glitchy.