As you can't kill the enemies at all, it became extremely difficult to play and I also got stuck between two walls early on that I could not jump out of. Also, if I'm hit by an enemy and fly down a pit, it crashes.
I personally found the difficulty just right - I died twice in the beginning and completed the game fairly quickly
You most likely missed that you're meant to shoot the enemies by clicking rather than jump on them.
Oh this whole time I could shoot? Well aren't I a complete idiot lol
