Fun game! A concept I haven't seen before where you start at the exit of the level and have to go backwards to find the "key" to unlock it. Hopping around guessing for the ghost was fun. The invisible platforms fit the theme of "guessing" where the objective is, but in a few of the levels, 100% of the blocks were invisible and it felt a little difficult. Maybe if the blocks were highlighted or glowed temporarily when you bonked them would make the game feel more rewarding. Good work, I had fun playing it to the end!