Title screen on GB color (and GB Color emulation) use high colour routine to display more colours, Maybe Gameyob & Lameboy are not accurate enough for this ?
About the crash, I don't know how it occured but my advice is to never use savestates as the game rely heavily on the content of the data saved on SRAM. If there is a discrepancy between what is stored in SRAM and what is in RAM, I cannot guarantee the game will work (we just discovered this recently on Analogue Pocket and Lynx version)