It's chaos. Two player sprites. Spikes that stay the same in the same place. Uneven ground. So, you want to know how to play? - Move with arrow keys. - The arrow keys move both the players. - R key to restart the level. - Get both players to the edge of the screen to get to the next level.
Credits to @-Qux- for the pink player and the ground...and the spikes, I think. Credits to @Magicdino1 for the blue player and blue platforms.