Thanks for feedback!Yes, I was inspired by Celeste a lot.
I could made a better camera, but for lack of time I wouldn't have enough time to implement it
About shadows, I've already written below why it wouldn't work
I see.. are you sure there is no setting to enable shadows for web builds? In Unity there are settings for different quality levels, idk how Unreal handles this.
Unreal Engine automatically sets the lowest graphics and without post-processing, so it is impossible to change anything in this case.