This totally reminds me of Family BASIC. It had a music editor and level editor, and I had a fond memory of playing (i.e. programming) it at a friends house. Th

This totally reminds me of Family BASIC. It had a music editor and level editor, and I had a fond memory of playing (i.e. programming) it at a friends house. The biggest problem: its memory storage was only 2Kbytes. A program had to fit in basically one screen. Also when you use the music editor, you had to give up the memory for programs. I kept saying "Phah! Mai-con (abbrev. of "Microcomputer") is so much better!" just like I do today.