Thanks snoek09, just tried and it's now working perfectly!

Thank you!
I thought that was the value I needed to change but just wanted to check.

I have just finished my first GBZero build, but am having a small problem with the Teensy controller. Sometimes when I press a button it registers as more than 1 press. Sometimes 2 or 3. I have read on another thread that it helps to adjust the bounce value in Wermys code but unfortunately I don't k...