But if you build it, more people will get to enjoy the concept.
It isn't Hunt Library in CMU campus by any chance, is it?
Actually I was considering 5th Avenue Place downtown (the Highmark building) for Light Up Night later this year, assuming I can get permission for it. Hunt already has the lighting for it but I'm not sure it's tall enough to be able to play Tetris effectively. Although if the blocks were to "fall" horizontally that would actually be pretty interesting. Were you/others planning on doing a version on Hunt?
they are not the first to do this. berlin had the first blinkenlights installation in 2001! and it was controllable via sms/phone.