Have you tried sokoban, it's critical thinking. Type in sokoban and scroll down to the billybearforkids site and this is probably closest to the original games. There are many copies of this game set to different enviroments. If you solve level 14 let me know how. Why can I get beyond that level but can't solve that one? Is puzzlement.
I wish I were a cat and belonged to me ~ My Aunt Helen Mary Rose