Loved the game and completed it to the end! There are a lot of game mechanics and they are used across all levels in different ways. Also, good job teaching game mechanics, I never felt stuck in game.
If you are planning to improve the game, you should really think about adding some animations and sound effects to make it feel more dynamic. Also, in some levels you can go across the screen edges, in some level you can't. I would wall off levels where you can't cross the screen edge to make it clear.
Finally, rope climbing feels a little weird, acceleration/deceleration could be made waaay faster.