My first web app in Arc - Guess the number

[coconutrandom]

http://coconutrandom.com/2009/06/28/a-noobs-guide-to-web-apps-in-arc/
play the game here http://coconutrandom.com:8080/guess

requires Arc http://www.ycombinator.com/arc/arc3.tar
and MzScheme 372 http://download.plt-scheme.org/mzscheme/v372.html

This is my first month on Lisp, any ideas on where to go next?