Played with a keyboard on normal. Obviously the game was meant to be played with a gamepad but the keyboard controls are fine for the current build. Only issue I had with them is that having there be two dash buttons feels awkward, especially since the air dash doesn't care which dash button you're using, and that not being able to browse the menus with a mouse is a huge pain in the ass.
First boss starts out fine but by the third phase it becomes a huge pain in the ass to read his attacks in time to react to them.
Second boss is harder than the first one but actually feels much fairer because it doesn't have this issue. I also like how he "learns" to use your moves after you use them against him. And, I'm not sure if this is a bug or something intentional, but when cyan does the attack where he jumps way up, sometimes he doesn't make spikes appear from the floor.
Third boss I have no idea what I'm supposed to do to avoid some of his attacks.