Spent an insane amount of time reformatting the URL so that I can add the new Words/Maths/Logic shortcut URLs into the mix.

Seems to function well enough, and should allow people to quickly pick their favourite types of puzzles from the site.

Additionally added a very brief set of instructions for the games in the "How To" page. Hopefully that's enough instructions to get the player going.
As always, let me know if it isn't!