Check out one of my old nodes about a very similar problem. There are some problems with ReadKey on Windows for certain keys (arrow keys, delete, etc.). Sorry for not being much of a help, but you're not the only one with this problem.

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Washizu
Acoustic Rock + games

In reply to Re: Capturing arrow keys on win32, crossplatform by Washizu
in thread Capturing arrow keys on win32, crossplatform by BUU

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