Yeah, sorry about with that. What with a job, a business to run, being a husband and parent, while also making 30+ FREE games in a matter of years, it must have slipped my mind. The code is available on Github, why don't you do it?
In the meanwhile, a Deluxe version of this 2-button-hack exists (can be found on the CSDB). Now the player can either use "C64 Fire 2", the "Space-Bar" or "direction up", to turn the falling pieces counterclockwise. This is perfect for different available controller-adapters, with which the user can have "Up", "Space" or "Fire2" on a controller-button. And also with normal 1-button-joysticks or -gamepads, the players now have a possibility, to turn the pieces in "Oy Up" in the other direction (simply steer upwards to do so). Such a 2-button-option (Fire2/Space/Up) would also be perfect for "Pillars" and alot other puzzle-games on the C64, in which falling pieces must be turned in different directions (Tetris, Dr. Mario, and so on).In addition to this, a bug in the original version of "Oy Up", has also been fixed, on this occasion. In the original version, the cpu-opponents (of the 1-player mode), no longer react, if a 2-player game was played directly before. Looks, as if the cpu-AI has been forgotten, to be switched on again.