updated rubyzip

some refactoring for future automatic variables dependency graph draw…

…ing using gems 'parser' and 'rgl'; also updated READMER a bit

oops, were out of 200 LOC

P to pause; restart had a bug, idk how it worked

screenshot with Score and Level

checklist formatting in Markdown README

reduced LOC from 211 to 132 -- is it time to add?