Two players are running counterclockwise on an orb, collecting their objectives when they take turn. Their actions are remembered when they switch to the other player (your own jumping) and this creates the endless conflict, because now you have to avoid your own previous self, and when objectives are achieved this process is infinite.
Unzip, step into release directory. Run "Catch-22 Build2.exe", set up resolution and graphics quality and input (as required).
Catch-22 is a one-button game, the 'Action' button used throughout the game, is mapped to the spacebar or the 'A' button on a Xbox 360 controller by default. This key may be remapped.
Press "Play!" and enjoy! Play!