Did you find it?

If you collect a different power-up while flying, the game doesn't swap state but removes your ability to manually stop flying. The only situation I know of where this is possible is during the transition phase of Act 7: https://www.youtube.com/watch?v=lplruasIDTE Only way to get out is to quit to the map and reload the level....

this is annoyingly hard ...

Every time I start the game, I need to change to fullscreen. Can you make this setting be saved?

Not sure what I'm missing, but there's a double jump section with a low bell over a bottomless pit that, as far as I can tell, is impossible to clear. I've tried this jump upwards of 30 times and each time I either lose momentum to the obstruction that hangs down, or a don't have the right angle to make it from further back. Nothing seems to work. And either way - if this is an oversight or a bug or even intentional, I think it needs to be tweaked. This particular jump doesn't feel properly playtested....