See CONTROLS file for key bindings.

You can use the filein method in squeak (http://squeak.org/)
for using this code, Game is the category that will be loaded.

To program in squeak, read a tutorial on or open a system browser etc.

This code works in Squeak version 4.3.
Keep the image files where your squeak binary is.

To test the game after filing in Game.st,
load this in a transcript with Alt-d : 

| t |

t := TestGame new.
t test.