It appears you are playing on a mobile device, the minimum screen height for this game is 725px, and the minimum width is 550px due to the way I coded certain positioning.
Please come back on a desktop/laptop computer to play.
Yee haw, introducing Showdown! A two-player-same-device 1v1 shooter, with a western theme - you control a cowboy (red or blue) and must defeat the other cowboy in a shootout.