It's a fun game ! I'm not completely sold on the rotation of the whole "orbit" to aim as it makes things a bit awkward and ennemies getting stuck in the corners of your "system" can easily bully you in the final boss. It's especially tricky when you're trying to play using WASD where you have to stop moving to access ZX.
I also like the fact that you can straight up go to the boss if you're feeling brave but the level selection is a bit confusing : after getting my water friend i selected the level with the fire guy but turns out i should have picked the yellow one because the ennemies were also blue.
Good job nonetheless !