Heh. This is amusing.
So, bash has loose variables that can be either strings or numbers? Seems like the same instantiation method creates a variable or a string, as needed. Like VBScript.

There's about 10 minutes worth of fun here. I got to the 'library' where it just starts dumping a bunch of 'spells' on you. The entire thing consists of 3 directories (rooms) with a few executables that are simple tutorial text dialogs.