Great game. The art style is simple, but communicates well what to do. The only time I got confused was in a level where I was supposed to press white buttons to trigger green platforms to activate/deactivate.
Weapon feedback feels great. I don't know if this is intentional or not, but I could only aim vertically or horizontally, but not diagonally. I would expect to be able to do so, but it's a minor thing.
The character design is cool
I made it to the 4th red level. Game is quite hard for my boomer fingers.