The only things that i can see need improving are that the sky needs to be higher, but also, if you do make it higher, implement the same system as in reminissions with the 2nd exit:
really, that should be a solid, diagonal line
|
original height |
| v
| ----------------------------------------------
v -----------/
------------------/ <--------speed jump
so it kinda forces them down, but doesnt just make them whack their head on the ceiling so it feels like it's gravity forcing them down, not a brush