I loved the intro cutscene, it's really funny.
But the character feels way too slippery and floaty! The mouse slips around as if on ice when on the ground, and in the air it feels like a rock that I can't control. The first few levels were already hard because you need to land on small cubes and I would just slip right past them. You should definitely give the player more control.
Also, what's going on at the top? I think it's a cool idea to have the scientist look into the box, but why is he appearing and disappearing so fast? I guess it's a bug?
All in all, I think it's a cool idea, but these two problems (especially the first one) made the game way less fun then it could've been.