I'm going to call the game 'finished' now. The only major update from the jam version is the addition of a map to make things a little less confusing. The map tracks the trails you leave in the game so doesn't undermine the essential challenge of solving the maze.

Adding the map revealed a bug where quickly changing inventory items and reading items (basically holding X and Z) could crash the game.

I also  added a bunch of optimisations, the game idles at around 20% CPU at the start of the game whereas it used to sit at 70%. So slow-down is still a possibility but hopefully far less likely during normal play.