I like the idea of running through the same level twice, you can have a lot of fun adding to that idea if you plan to expand the game! Things like one way doors, collapsing bridges, or updrafts could get players thinking about how they can make their ways back. The core gameplay is very solidly shaped, but a few unlockable reward could get players fully invested in the challenge.
I love how expressive and cartoony the sprites can get. Really nice art with sound effects and music matching the action!
The angels don't feel great as an obstacle since they are either irrelevant if you're going fast or difficult to escape if you make a mistake and get juggled. Some sort of indicator of where you're going and more landmarks can help out with navigation. Fewer multi-layered pits that have to be repeated if you fall will help the game feel speedy. Faceplanting into walls is a really funny, but I wish the mechanic had a minimum speed requirement. I never felt the need to let go of the run key, so maybe it could be a toggled effect instead?
I really enjoyed the speed and acrobatics, they felt great! Making very fast characters that are fun to control isn't easy, and I think you've done an excellent job!