I don't know, maybe I'm just a loser or my fingers are too fat for my phone or something ... but I don't get the highscores o.O
Classic is kinda bad luck, I died several times at around 180 or 190. Ok.
But the 200 in Zen and 400 in Arcade seem impossible to me! My highscores are roundabout 180 and 360, but I don't get any more points, no way. And I already have the 10k-Cheevo, so I played a lot.
So please put up the difficulty-rating by some points, so that I don't feel that bad any more