Because everyone's talking about it!
The graphics are pretty good, obv. 2.5D is the way to go. The music is forgettable, but nothing's really wrong with it. The physics... they're annoying, sure, but I think that's mostly because of the comparison to classic Sonic games. The physics aren't as good as they could be, and they don't really fit with Sonic, but they're not necessarily bad per se. The worst part, though, is that like 70% of it is just ripped straight from Sonic 2 (and another 15% from Sonic 1 or Sonic 3&K). That, and the price; $15 is too much.
FINAL VERDICT
All people wanted was Sonic 2 with new levels, and SEGA still managed t