This is a very fun entry! I enjoyed big maze-like levels and the mechanics introduced in every level. There is a lot of replayability with time trials and the different surfaces on levels add a lot of depth and strategy.
My only complaint is a bit nit-picky but when i frantically try to click and move my mouse as fast as i can to beat the level I sometimes click on window borders and accidentally resize of move the entire window. Otherwise a very fun game with a lot to offer, congrats on finishing!