Size the dimensions for the game in pixels. Ensure that the dimensions you choose will fit into the dimensions of your computer screen or webpage. Use a pixel-to-inch conversion factor of 72 pixels per inch.
Start Adobe Flash Professional and select Flash ActionScript as the file type. "Click" the "Windows" menu. Check to see if the properties option in the window's menu is checked. Click the "Properties" option if it is not checked to display the properties panel.
Click the "Edit" button in the properties panel. Select "pixels" from the ruler units list box. Set the width and height dimensions in pixels in the width and height dimensions text box. Use the values you decided on in Step 1.
Find a graphic file of a football that is in either GIF or JPG format. Click the "Import" command from the "File" menu, then "click" the "Import to Stage" command from the "Import" menu and "click" the graphic file name from the file dialog box and then "click" the "OK" button. "Click" the "Convert to Symbol" command in the "Modify" menu. Type in "football" in the "instance name" text box in the "Properties" panel.
Click "Actions" in the "Window" menu so you can assign drag interactivity to the football with the startdrag method. Type the commands: football.addEventListener(MouseEvent.Down, startfootball_fn); function startfootball_fn(event:MouseEvent):void{football.startdrag()}; football.addEventListener(MouseEvent.UP, stopfootball_fn); function stopfootball_fn(event:MouseEvent):void{football.stopdrag();} into the Actions Editor.
"Click" the "Test Movie" option in the "Control" menu. Position your mouse cursor over the football, press down the mouse button and drag the football. Release the mouse button to stop dragging.
Import football players and a football field.graphics into to your football game. Use the same procedure as in Step 4. Use either Flash's hitTestPoint or hitTestObject commands to display a textField that will display the message, TACKLED, when the football icon you drag hits a football object. Type these commands in the action editor along with the commands needed to stop the drag function when you are tackled. Follow the syntax that Adobe specifies for these ActionScript commands provided in the reference manual for your particular version of Flash.