Guessed by dave_chatting

OK, so it looks like the it's going make some sound with the headphones... the jack must be for that... but why headphones rather than a speaker? A private experience?

Presumably the "device" is going to moved (by hand?) as there's the accelerometer there to sense it... but what's with the suction cup? That's there to hold something steady... erm...

With the 7 seg display you can count from 0 to 9 - that's probably a representation of the movement or some function of pressing the button

My current best guess is a dice that you shake - but don't get the headphones or suction cup!

I like this game! ;)