Thanks for the comments!
We recognized (perhaps a little too late) that the keys on the keyboard would severely limit the game. Going forward, I think if we improve upon anything we will try to make it a touch-screen based implementation so that it is less limited.
Sorry to hear there was trouble with the title screen- Our hope was to 'tutorial-ize' the main gameplay in the title screen so people would have to practice each mechanic at least once before starting the game (i.e. holding down letters, using space or enter to score, using shift+ctrl to copy for the word 'START'). It seems like we didn't manage to get that across too effectively.
Thanks again so much for your comments, we really appreciate the feedback!