The is a cannon-fort meant to make a twisted minecraft version of that old windows game bang! bang! Remember that old cannon game?? Used to have so much fun with that one. Anyway for this cannon, use worldedit or something to rotate a schematic, face 2 cannons towards each other. 2 players get in their own cannon, push the button to shoot, go to the viewing area to see how far/high the cannon goes, and use the "timing" area to adjust the cannon's firing angle. A fun idea I had was to make a fence on top that you can put mobs in before playing, first person to kill the other players mobs win :) The default repeater timing settings make a beautiful cannon launch as is, so you may want to reset the timing to fastest so players have some work to do!