can you check if the nostalgia.gbc emulator uses the same engine as the android gambettan can be used? it is from android because i can't buy a pc i really want to speed up gbc games i would be very happy if you do this favor 🙂

I cannot comment on this, but I use MAME4Droid and a galaga.zip ROM on my Android phone and it is a 100% legit emulator experience without a PC if you're looking for another option.