The artstyle looks great, the concept, although a little hard to grasp works well with all the features, and otherwise a fun experience.
But the platforming could have been a little bit more lenient and the switches should have been introduced in an earlier stage, as they really made the game come together.
Also, the switching mechanic had you waiting when you were still trying to move up. Having control over switching players (but not over shot intervals) could have made it just as good as of an idea as it really was.
The lack of sound was a real bummer, as just some jump/shot sounds and a music track would’ve enhanced the experience.