the game was a little too hard to finish, some things i think can improve it is working on the camera system either making it static or have some damping and look ahead, another thing that can improve your platforming is having gravity be weaker when jumping or going upwards and stronger when falling, this gives the player some hangtime and enough time to make out where to land its really easy to add as well.
but good work on the game, the opening cutscene was nice