Just happened to come across this while doing some browsing, and thought that it looked pretty awesome. Sonic 2 is a classic in the series or in general, I'd certainly like to play through it again with those remastered graphics and music and the widescreen view. As a fangame it's setting a pretty high quality standard as to what can really be done, especially with all the attention to detail that they're taking in re-creating everything as can be seen on the dev blog. They've also fixed glitches that were in the original, and plan to add new content such as zones that never made it into the final game and online multiplayer. From what's been shown so far I imagine that the full game is still awhile off, but it's surely something to look forward to.