Well, the Art and Easel program is somewhat simplistic and buggy. When I drew something, then pressed A, for example, the program crashed. Also, you're using sprites for each pixel, which is the fastest way to do it, I guess, based on the framework, but not very efficient. The sprites boundaries do not closely match their images' frames, and the SGDK2 project itself is not very well implemented (for example, you have left several objects with their default names, "Rule 1" "Plan 1" etc).