Koopa Avalanche:

You have played many games where Mario was the hero and Koopa was the villain, but now let’s play a game where the hero is Koopa. Your objective in Koopa Avalanche is to help Koopa to avoid all the falling spikes and evil Bullet Bills. Move out of the way of the falling spikes using the left and right arrow keys, and press the down arrow to duck the Bullet Bills, when Bullet Bill turns red get ready to crouch to avoid the deadly bullets. Collect mushroom to gain lives and coins for bonus points. You have to score 6000 points to win the game.