Amazing music and art direction, that was awesome ! The concept is fun, but I feel like the game is way harder than it should be : the grapple mechanic is very tedious to use, with his pretty long start-up time and cooldown. Also, at first glance, it was a bit hard to know what is a platform and what is not.
Overall, that was a great game that just needs a few tweaks to achieve perfection =p ! Congratulations ^^ !