This game is pretty fun, but also a bit frustrating due to the lack of control. I see you've chosen to interpret the "flight" as flying instead of fleeing, which isn't wrong, but now the problem is that the theme is "fight or flight", while in this game you fight by flying, meaning the two aren't exclusive.
I didn't see a way to return to the menu without refreshing the page and I don't get what to do against the plant wizard's vine attack.