The best tapping/music game RUINED by non-stop ads and aggressive attempts at cash grabbing. One miss and you lose! It costs you gems to stay in the game...the idea is to enjoy tapping the WHOLE song, not until you miss the first beat. I had a 200 perfect streak, missed one and lost the stage. Claimed a prize and it made me watch an ad for 30 seconds. It did this 3 times in five minutes. Everything is forcing you to pay. I would have loved you charged me for this game and make it a mobile DDR!