A few years ago I finally completed K240 without cheating.
In 1994, my brothers and I played the K240 demo from the CU Amiga coverdisk. We got the full game because the demo teased you with features that only worked in the full version.
But the demo version gave you a lot more free ships/missiles/credits than the demo, so we turned to cheat codes.
Years later, I finally beat the game with no cheats. It was weird having to actually sell ore to the Imperial Transporter. I also learned the value of ramming the enemy with asteroid engines.