THERE IS A GLITCH THAT EVERYTIME YOU GRAB A SPECIAL COIN ( BLUE COIN ) THE GAME WILL BRING YOU BACK TO THE MAIN MENU, I BELIEVE THE COIN WILL SAVE THO, SO GETTING ALL OF THESE IN THE SAME SAVE FILE WILL BE A LOT OF WORK. THE GAME WILL AUTOMATICALLY SAVE AT THE END OF EVERY WORLD AND BEAT LEVEL CANNOT BE REPLAYED.

Works perfectly !
This is only guaranteed to work on original system, should work on 90% of clone consoles BUT I DO NOT guarantee functionality on none of them. I know for sure it will NOT work on a RETRO FREAK and RETRON 5.