This one's an odd duck to say the least. A slightly remixed version of Turtles in Time made for the Genesis trying to pass itself off as an original game, Hyperstone very awkwardly recycles assets from Turtles in Time and includes original assets of markedly inferior quality, particularly the bosses. The game also generally has weaker progression with a very underwhelming final two stages. Sound and visuals also take a bit of a dip in quality. The main thing that saves this game is the excellent play control, with a smoother feel and noticeably faster gameplay putting it closer to the arcade original Turtles in Time than the SNES version in that regard. Having a dedicated dash button also makes the dash attack moves much easier to use, though the Cowabunga Collection does kind of undermine this upgrade. It's definitely a fun game, and a different enough experience that I'd say fire it up from time to time, but the overall package falls pretty short of either version of Turtles in Time.