Cello Fortress

I am in the committee of the 13th Cellofestival in Dordrecht and
went to a meeting about a new phenomenon: Cello Fortress.
The guy on the right (Joost van Dongen) made a game where
you have to fight in a team of 4 agains him alone.
He is playing the cello and with his frequencies he can alter
the amount of defence you will encounter. It was really fun to play!
Also there was a bit of a generation gap. I grew up playing
games, and the rest didn't. So it was quite challenging for them.