Mine never said “C button pressed” or anything. I am wondering if there is some kind of hardware issue because for example to invoke the loader I can modify the code to use button A instead of C and something happens (screen says something about “no loader found” or similar). But pressing C never produces any effect.
I will try few more test in the afternoon. When I upload some compiled bins from the online mbed, Pokitto does not always “run” them even when they compiled and downloaded correctly (screen stays white, so trying stuff is really tedious)