present  countdown restricting your play time; you get an additional 3 minutes for  each coin you insert. The Mega Play version has a few differences: its based  on the Japanese version of the game, complete with scrolling clouds (see  above); the timer counts backward instead of forward, with rather strict  limits for each stage (fortunately, if you die and touched a Start Marker,  youll begin at the Start Marker with a reset countdown); any extra lives  collected are ineffective (if you want to continue your game, you need a  pocket full of quarters); there are only four Zones to play (Green Hill,  Spring Yard, Star Light, and Scrap Brain, the lattermost of which is missing  its final Act); there are no Special Stages (even if you jump into the giant  Ring at the end of an Act, youll just start the next Act as usual); and  finally, theres no credit roll 