hehe. The boss key will make you laugh... but you will have to wait for final release for that one. I've added your SCI Tetris to the Homebrew Komputer Klub scene. There are various arcade machines that you can play in the old movie theatre. The homebrew nerds have setup free play on them. No buckazoids required.
I was looking to get Doom working in a mini game in some form or another ...I was trying to do a Wizardry style 3D wireframe to save on memory... but I think its too complicated at this point of time for my SCI coding knowledge ...