This is so much better than Sonic Advance 2. The levels are prettier, faster, and the game is more Sonic-like. It reminds me very much of Sonic 3 on the Megadrive.
I’m enjoying it much more than Sonic Advance 2 as well, and I’m now up to World 3. The levels seem bigger too, and you can save after each Act rather than only after each Zone, making having to continue much less frustrating. Bosses are more standard Sonic bosses too – none of this constant scrolling, run-after-Eggman-and-hit-him rubbish.
And the music for Sunset Hill Zone is a remix of the original Green Hill Zone from the first Sonic game, which is a nice touch.