Sounds simple enough, but there is some challenge to it. At the start of the round Policekoopa Bowser Junior and Policemen Jeffy are roaming about and will chase you should they get within range of your character. Take too long in chasing down all the mares, and Joseph and Cody spawn, as policekoopas as well. Upon having sex with all four mares you proceed to the next level which is a pallet swap of the first with all the same mechanics. There are two lives per credit. Upon losing both lives you are dropped back to the first level. There are bonus pickups in the stage most are for score, but one, the perfume, makes your character move faster. Simple enough gameplay.
Note: This game is actually fake. Though if this was a Rom hack for the game and if anybody used it in the original game, that would be pretty cool!