I like the bounciness I get from the audio and artstyle! Interesting usage of the different mechanics as well!

Some things to consider:

Movement felt a little janky, especially the jump. Maybe make it more fleshed out and make inputs more precise? That might make it more enjoyable to play! Also I got stuck on one of the first levels so maybe introduce the mechanics and difficulty a little slower.

Overall, it's a nice game. Good work :)

The controls are really weird. The character switch button is one of the shifts and not the two shifts. And the mouse click to detach is really stupid.

I wanted to beat level 4 in singleplayer, but it's pretty much impossible because of the way it is.