Hello there. I think I need to explain to better understand the context.
First of all, the Android port of Sonic Advance is an old official software by SEGA released in 2011/2013. And the games on this page are presented as game mods. Not fan remasters.
Secondly, the frame rate is indeed terrible (running at 15 FPS). I wish I could fix this issue, but I'm not an expert at Java/Smali programming. I can only modify what I can understand in the game's code.
Wait... It demands access to "contacts" ? This is strange. I have to test it out.