Had fun playing your game!
Speed of the main character provides good amount of complexity.
I would work a little bit on a dynamic though - sometimes u can't place platforms only because your bunny made a crazy jump and u cant put a block where u wanted. Maybe you can make smth like slow-mo in HUE (when you choosing colour). It will be still demanding fast decision making, but would't be perceived by player as totally unfair and unmanagable