DIY capacitive keypad

Hello everybody,

I often play PC flash games that requires intensive mashing of 3 or 4 keys. Those games generally end after 10 minutes, only because my fingers and wrist hurt too much.
So, I started thinking about making a capacitive keypad that would allow me to go easy on my fingers. All I would have to do is to touch the keys softly, as I would do on an iPhone.

What I need that keypad to do/have:
- have 4 keys that would be mapped as 1, 2, 3 and SHIFT key
- detect multiple press, also detect the Shift key holding

Just to be honest, my electronics knowledge are about highschool-level (the only stuffs I made by myself recently are some arcade sticks for fighting games..) so please bare with my noobness

Anyway, after reading and googling a lot, I think I'll go the following way to build what I need:

Capacitive keypad PCB > Teensy 2.0 > USB > PC

As for the capacitive shield, I have found this: https://www.sparkfun.com/products/10508

My questions is: what do you think about this? Will it work?

Any feedback is welcome. Thanks in advance.

You probably want Teensy 3.0 for this. It is a touchRead() function, which you use just like analogRead().

Thanks a lot, I'm ordering that then