Canadian

Position players by clicking and dragging them.
With a player selected, hold down the Ctrl-key (Command-key for Mac) and click to add a line to the players pattern.
Load a template play by selecting the menu item 'View -> Plays', and then clicking the 'Templates' folder, and then clicking on one of the template plays.
Simulate the offense versus defense plays and generate a "film" by selecting the menu item 'Film -> Film "Untitled" vs "Untitled"' and then press Enter (or Space).
Fast forward and reverse the film by dragging the video scrubber control (knob).

You can also ...

Change the resulting simulation "film" by clicking on the image of a player to expose all of the frames for that player, and then by dragging or rotating individual frames.
Change the look of the field, players and film in the 'Settings' by selecting the 'View -> Settings' menu item.
Dock the 'Settings', 'Plays' and other windows by dragging them to the edge of the field window.
Edit plays for other team types by selecting them from the 'Team Type' menu.