THERE IS A GLITCH THAT EVERYTIME YOU GRAB A SPECIAL COIN ( BLUE COIN ) THE GAME WILL BRING YOU BACK TO THE MAIN MENU, SO DO NOT GRAB THOSE.
THE GAME WILL AUTOMATICALLY SAVE AT THE END OF EVERY WORLD AND BEAT LEVEL CANNOT BE REPLAYED. THATS HOW THE GAME IS.

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.