Hey! I just tested your game.
The look and animations are really nice and I like the overall art style.
The overheat mechanic is quite satisfying, but IMO the game lacks other mechanics to stay fresh. Also the double-jump animation could feel better (with more animation on the character, which, I guess, means a lot of more dev time! ^^).
As for the juice part, we can feel the screen shake when we kill an ennemy or die, and the sound effects are nice!
Good job! :)