Nothing the ol' hug the left wall trick can't beat! But why are the screenshots of a totally different looking game?
The extra hazards added in don't feel like they add a lot to the experience. Pits are basically just more walls, and the ceiling/floor closing in didn't affect my ability to move around at all, so just acted as the same sort of timer.
Assuming the screenshots are of the game you were able to create, and then something weird happened with the export, it looks really cool! But the credits show a different name than yours, so I'm not sure, is that just someone elses game?