I have very fond memories of making games in Qbasic, usually just silly random guessing games and event generators. I did manage to make simple versions of two of the stages in the arcade game Tron, namely the MCP cone and light cycles (where each level had at least one winning “pattern”).
There used to be a few repositories of others’ Qbasic work, but I can’t find them anymore. I remember a pretty good stock market simulator, and a REALLY weird life simulator where you could go to work, go to the movies, buy cigarettes etc. You could even rob the bank if you wanted.