Fair, ~I expect turning 90 degrees up and down, i.e. ultimately being able to treat all surfaces as floors~ (actually that seems to be allowed according to the rules) or flying up and down also is breaking out of the genre a bit too much.
We've actually had a couple entries in previous jams that let you crawl up and down, even on walls. In fact last years winner (Labyrinth) is great example of that. As long as you still adhere to the grid it's allowed.
