scheme robots

A programming game I'm making
Any feedback is more than welcome
It runs in javascript and html5, and has a scheme interpreter that can't do proper tail recursion.
http://schemerobots.comlu.com/textarea.html
Put the code for each player in the textareas and press submit code.
Example code:
http://bpaste.net/show/hRqvv38dZSc3NtNNezaV/
It is a work in progress, creatures lose hp but don't die yet.

>>5
There was a thread recently in which someone posted a link to a comparison-by-feature table of various Lisp JSs. I can't find it now, but if that rider reads this, I'm sure they wouldn't mind posting it again(?)