Haha it was really quite interesting, you did a good job with jump/gravity settings and mechanics. I must say graphics are poorly optimized for integrated graphic chips, especially in the first half of the game where you are in the... dungeon? whatever it is, you understand what I mean.
All this parkour reminded me of CS 1.6 with its deathruns. It was quite engaging! Also, the area where you get to know your very first trampoline is kind of difficult, it was more difficult than any other part with trampolines.
I wasn't really listening to the characters, so I might not get the main idea of the game. It feels fun to do parkour in this game, but if the game would have been longer player could get bored without a more "driving" story, you know what I mean?
Overall, it's a truly nice game! I enjoyed playing it, 10 minutes of my life just skipped. You did a good job with music as well - it does not pretend to be listened to, but it creates certain atmosphere.