Positive it was PHIL COLLINS IN THE AIR TONIGHT and l also single Tetris screen so NOT Twintris......thanks anyway but after posting on several Amiga boards I am really thinking perhaps it was an obscure PD contribution perhaps from Aminet or some coverdisk and probably lost to me forever....
Don't lose hope, how about "Power Tetris", nice graphics very good background music, it's a shareware, I'm not sure if the music was by Phil Collins...
I still have the demo disk.