Small update to P-Lisp page

I recently added a small file to my page with P-Lisp which adds a few
more Apple II specific extensions, if anyone is interested:

I'm trying to think of a small project using P-Lisp.  I'm thinking
some sort of logic game might be nice.  Of course, the "obvious" thing
would be basic symbolic math but that already exists in with mumath so
why try to re-invent the wheel (unless for fun, which might be reason

Any ideas?