Fixes game locking bug, adds var support to PRINT.. AT and adds some debugging.

You can try it at home! 'print "lockthegame" at (8,6.' Debugging tells you when you are printing off screen and missing brackets. Nested bracket should be able to be support with a little editing. Still a bug where if there hasn't been text before it fails to write it to the location. I'll work on that when i have had more sleep.