This is really fun. The combos are satisfying. Banking them off the energy walls and smashing through multiple enemies.
In the later levels, when a lot is happening at once, I would sometimes lose track of the mouse cursor and realize I was aiming the wrong way. Mouse and keyboard felt a little clunky to me at first, but that may be because I don't play a lot of games that way.
I think twin stick controls on a gamepad using the triggers to dash and grab/throw would feel great. It could add granularity to the movement controls, in terms of both direction and speed.
Reading the other comments I see you already got similar feedback, but I had a similar experience. Other than that I fell into a state pretty quickly where I was just playing the game and enjoying it. Obviously there's content and polish that's needed, but the fundamentals felt pretty solid to me.