Shoot'em-up Tutorial

Side scrolling shoot'em-up tutorial, from Wireframe Magazine #53, pages 58-63.

Use the cursor keys of your keyboard to move, ctrl or space to shoot. Kill the enemies shooting them, and collect the power-ups to improve your ship.

The magazine: https://archive.org/details/Wireframe53/page/58/mode/2up

The code: https://github.com/Wireframe-Magazine/Wireframe-53