nice start but there are a few thing i didn't like:
The forward jump is to "Strong". the momentum is hard to control, i think unresponsive would be a better word.
overall the arial movement feels weak. Even if it's suposet to be hard, i would tweek it a bit.
The rotation of the camera the second i stop mymouse movement. It looks like a glitch. If it's not, then it would be better to delay that until, like half a minut has pased (without any in put).
Bug: when useing the jump boost then landing on the chest you can jump again to do another jumpboost (is you didn't touch anything else during the jump)