swipe keyboard code crash on back button

Updated to 0.04. The back button issue is fixed.
I'm a familiar with the old Graffiti gestures, had a few Palm OS devices in the early 2000s.
There a lot of potential with this, its much easier to use than the Touch Keyboard.

I'm getting a few issues getting the following letters to be recognised:

• w more often than not coming out as space
  
• I cant get q at all
  
• z more often than not comes out as a y
  
• g can be tricky. The only reliable way for me is to put a loop in it - like the picture below.
  

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