Highlight - Implemented. Will be in the next build, whenever that is.
Timer - I'm trying not to make the game take forever, so 30 seconds is all you get for anyone. The idea is to use the power boosts to increase your total point gain instead of having to go for more time.
T Matches - I have to hard code every T and L match into the game. It's possible something slipped through the cracks, but without knowing exactly where each piece was when it didn't match, it's very difficult to fix.