Whenever i edit sonic 1 asm code then click build the rom all i get is a black screen. Even if i dont edit the asm, as soon as i build the rom its a black screen, fixed checksum that doesnt help and there are no guids that explain asm hacking very well... Im using Sonic_1_(Split_and_Text_by_Hivebrain) and im trying to add spindash to Sonic 1.