Obvious copyright infringement of classic Mario games. It works the same way, just with worse graphics and a bad story.
This is just another game which works the same way as Mario. However, Mario is probably the best game ever made for NES. They mocked Mario in ways such as: You play as bugs bunny and collect carrots(coins) while going forward and you can't go back(sound familar?). After every stage there is a symbol like a house(*hits on head*) representing the end. Then, when you reach the end of a world, there is a boss[usually lvl 3 or 4](Interesting, bowser, world #-1).
All in all this game is not worth the $0.25 I bought it from a garage sale for.