SonicDS 1.2 Beta, is a big improvement of the alpha! Heres a list of things that have been added/fixed!:
Plays larger levels
Improved the engine
Has AI, but I didn't add it to the Sample files(If you want AI, build it with your level)
You can jump from under platforms!
Can play more music!
Has death engine(Not in samples)
Sonic has a faster jump
Hold Y to speed up alittle.
Has rings!(Not in sample)
Sonic The Hedgehog!(LMAO)
This game still has no lag, sound, a level builder(Improved), and Sonic!
Works on any emulator!
Sample Levels: Route 48, Stick World