Aside the listed issues I noticed another one:
infront of the floating platforms is a break zone for some reason, that takes away the momentum and causes often enough a fall into the pit.

otherwise my only other compalint is that the textures are just.. flat. I hope you can get some depth into it, maybe replace some with custom stuff, like the portals.

The size is actually good this way, TK2 has a lot of airtime movement and if it was smaller/shorter, it would be an issue.

Could use some work but otherwise it feels good to play so far!