I think it’s a nice little game with a few issues.
Pressing the ‘E’ key I was unable to reliably reverse gravity. I didn’t think it did anything to begin with, then accidentally got ‘E’ while jumping to work. I played around with it some more, but could not reliably make it work, so I couldn’t use the feature when needed most of the time.
I think that jumping makes you jump way too high.
I liked that you had ledges to roll under, and the reversing gravity idea is really cool, and I wish I could get it to work when needed.
I also tried going left at the start of the level and was able to jump out of bounds that way.
If you iron out some of the control issues it could be a really cool fun little platformer.