Osu!Cents
A two key touch keyboard for Osu!
Just get a Sparkfun Pro Micro (or clone), print this case, upload the sketch and go!
You just need two 1M Ohm resistors. One between pin 5 and 8 and one between pin 10 and 15. Furthermore you need two short cables. One at pin 5 and one at pin 15. The other end of the cables get connected to the 5 euro cent coins (please look at the pictures at Thingiverse).
The cable at pin 5 is the 'z' key. The cable at pin 15 is the 'x' key.
Have fun!