A really neat concept, but severely limited by the number of keys that most keyboards will be able to register at the same time. I'm normally a fan of unique title screens with cool ways to proceed, but I think that hurt you a lot in this game. Seems like most people who tried it can't get past the title screen.
It took me a while to figure out the shift+ctrl mechanic until the first word that used a letter twice came up.
This would be tough for a game jam game, but this game needs to have work done on it's word detection. More than once, I would spell a perfectly valid word, but since it wasn't the exact word the game was looking for, I didn't get points.