I like the different challenges and how attainable some of them are. I know I'm not on a ridiculously high level, but that's because I'm finding it progressively difficult to pass levels without going through 5 roinds of lives (25 lives) before beating even a "classic" level.
All the diffferent charcters and there costumes, and the fun they have, also some levels are very challenging, which I love. I play everyday , wish I could play on my PC as well