Libyans In Space.
This was the game shown as a demo on the Amiga 500 back in 1987 or so. That sold me, and I bought the Amiga 500 with that game and also Flight Simulator 2. Some of the other first programs I had was Deluxe Paint 2 and Deluxe Music Construction Set.
Wow, those were memorable days! I had DMCS hooked up to my keyboards using MIDI and had fun putting songs together. And Deluxe Paint was great too.