Famitsu magazine has revealed some new info on the upcoming GBA title. The game’s zones include Leaf Forest (the introductory zone), Hot Crater, and an unnamed, colorful music-themed zone. The level art is VERY impressive and just as stylized as that of any of the classic Sonic games.
IGN Pocket is also reporting that the game is apparently being developed by DIMPs, just like the first Sonic Advance.