They can fly off the screen upwards; that's what I meant, which is a bit unfair for me. I am not mad, because not every game is supposed to be beaten on first or second try, I just think I should be able to fly off-screen upwards as my opponents; or no-one should be able to do so. Right now the only moment you can be at greater heights than your opponent is when you get hit.
Yeah, it's on purpose! Otherwise being on the sky would be too safe (as just tapping up there would let you win all matches) abd that's boring and static. The idea is to fly aorund and juke them!
I will however add smoke to all units that can fly over you (and not just "powered up" guys") so it's easier to tell! Next update, as i will add some fan characters as well!