Yes, especially the canvas is great. I played around a little bit and had written an easy game within some hours. If you want, you can download it from http://www.fabiani.net/ -> Tips&Tricks -> Eigene Scripte -> Download von Käsekästchen

It's not yet finished (maybe will never finish), but writing it was big fun.

Have fun,
perl -e "print a|r,p|d=>b|p=>chr 3**2 .7=>t and t"