So I downloaded two of these games to my Samsung Phone... Sonic The Hedgehog 1 and Kid Chameleon.
So yeah, Kid Chameleon doesn't run particularly smooth on my phone. I do have a Samsung Galaxy Core LTE from 2015, so it is an older phone. But yeah, the game stutters for me a bit and doesn't give a smooth frame rate.
Sonic 1 on the other hand is the Taxman port. This is actually a great port and totally worth the free download with ad supports. I was expecting this one to be the Genesis ROM in an emulator, but it is the superior taxman version.
Though, shame that this version ruins the one that people already own. Ah, terrible!
Ah Shit, I guess I better back up that version of Sonic 2 I have before Sega moves that one over to the ad supported model as well...