Interesting game play mechanics! You managed to build a well balanced puzzle, and a good tutorial on top of that. The art and dynamic music is also really good! Good job! If I were to add more, it would be nice if we can control the player more precisely. Sometimes it can be a bit frustrating when the player moves too fast and hit the spike unintentionally, resulting in multiple tries even when the player already knows the solution to the puzzle. It's like, your game sits between puzzle and platformer genre- the puzzle player gets put off by the platforming mechanics, and the platformer player gets puts off by the puzzle mechanics. Mark Brown (Game Maker's Toolkit) designed it really nicely on his video here, if you haven't watched it yet. All in all, good job in making this game! I really enjoyed it!