SDL Mario Bros

Using left and right on the arrow keys, Mario can walk. Hold Z while walking to make Mario run instead. Press X to jump, holding the X button down for longer to make Mario jump higher. Pressing Space brings you through menus.

Koopas spawn in from the top level of the stage. They come in three colour variants, each with different speeds. To kill Koopas, either jump on them, or stun them with the Pow Block and run into them. Coins will also appear throughout the level. Killing Koopas and collecting coins gives points, with faster Koopas giving more points.

The player is given a short time limit. Within this time, they must collect as many coins as they can from the item blocks throughout the level. If the player collect them all, they are given a score bonus and the blocks are replenished so that the game can continue.

A short gameplay demo can be watched here.