First, this game includes a TON of tracks compared to most rhythm games on here and while theyre not instant classics they are catchy and well produced!
But there are issues too: If you use a touchscreen (how couldnt you?) your finger will block you from seeing taps you must make because its always twisting around and there is no safe spot to keep your finger. Also, its always changing perspective on the track so the most important thing, timing, is constantly changing as you play and its anyones guess if its asking for slow steady beat or a drum roll. Also later on, stuff flies in just as youre supposed to hit it so the only hope for a good score is to just mash through it until its memorized.
Ive played rhythm games like crazy since about 1998 and this game is still really hard because of the constantly changing rules and inability to see 1/4 second ahead in some stages. Still, if you can do without fairness, it is among the better high challenge music games, easily one of the top few on iOS.
DojoMojoMofo about Groove Coaster, v2.0.1