Cool! Easy to play but hard to master, i like how you took the effort to make a tutorial, really helped :D
It's nice how you don't really have one predetermined path a player must take to swing to the other side, there are multiple ways sometimes and it's fun to figure them out. The difficulty did increase quite fast, would have felt better if the first few levels were easier and fast, so a player can really get the "hang" of the game (yes that is a pun). Nice music, although maybe i was missing a sound for the hook itself? Could have felt more satisfying to have a sound once you latch onto a wall or something ^^