Use the arrow keys and space for the blue guy. Use WASD and E for the red guy. The floor slowly gets smaller, and don't touch the orange. It's supposed to be lava. Unfortunately, I was too lazy to put in a Win or Game Over screen... But I think you can tell who wins or loses by who is on (or not on) the screen.
I don't exactly remember where I got the ideas for this. Also, you may notice that the sprites for the red and blue guys resemble a previous sprite, somewhat. Anyway, enjoy the game!