What do you think about this Sonic fangame? I think it's pretty awesome, also because it was made when resources weren't as common as today, Physik Multimedia, the guy who made it was pretty smart using Sonic CD 'OMAKE' sprites in my opinion.
Download here: http://info.sonicretro.org/Sonic_Klik_%26_Play_Collection
Download here: http://info.sonicretro.org/Sonic_Klik_%26_Play_Collection