[oflordal]

Try http://www.robozzle.com for a game in similar vein with a bit more depth.

[tasuki]

Came here to upvote RoboZZle for the extra depth!

I once wrote a solver for RoboZZle: https://github.com/tasuk/zlej-rob

And a blog post: http://blog.tasuki.org/explorations-in-ai-solving-robozzle/

[pbhjpbhj]

Requires silverlight ...!

[tasuki]

There's a JavaScript version: http://www.robozzle.com/js/index.aspx