This game was first released as MISER for the Commodore PET in 1981. Considering the strict constraints of the early 8-bit machines — the original version only required 16K of memory to run — it was remarkable for its complexity. It was also written in a now-archaic version of BASIC developed for Commodore by Microsoft in 1977.
I decided re-implementing it in object-oriented PHP would be a fun task to tackle in my spare time, and completed it in just a few days, along with some enhancements and embellishments.
To access the game, use this link: http://miser.jmr.is
The video below contains a walkthrough. Warning: SPOILERS!