The 'mouse.p' is a small program I wrote back in 1983 for a ZX81-only maze competition arranged by a local (Finnish) computer magazine. It became second in that competition, and got a special mention of "creative display buffer usage". I'm still a bit proud of that :).

("Kiitos juustosta" means "Thanks for the cheese")

Jouni Rinne
Pirkkala, Finland
14.2.2020