A couple of tweaks to the engine before I move on into other Crossword based things.

1. I've finally got the "Score value bubble" looking a little more like a bubble, and showing up at the end of words instead of seemingly at random!

2. Tap to Play "should" now work, but is still a small threshold of "tap".
I might have to add the threshold into the option screen.. .. If I ever bother to make an option screen!!