A very enjoyable game! Really like how the music changes when you change sides.
As for some feedback:
- E projectiles were going through walls, not too sure it was intended or not. Would have made an interesting puzzle (like for level 3) where you shoot the projectile and swap between sides to avoid it hitting walls and hit the enemy
- The boss wasn't spawning enemies for some reason while in the white side until I swapped back from the red side
- some form of indication of where enemies are on the other side would be appreciated, as swapping and then dying instantly because an enemy was on top of you waiting on the other side is a bit frustrating.
Other than that, I can see this game to be expanded on in the future, really great work!