[twalichiewicz]

I'll look into what's going on with some of the other browsers.

To clarify, the game actually runs a quick validation when the timer runs out to check if your word is valid. If it is, the ball returns automatically—so you don't have to hit Enter or Space, but doing so early gives you a speed bonus.

As for getting rid of Enter/Space entirely, auto-submitting can be tricky with compound words (e.g., should it submit 'REGULAR' or wait for 'REGULARLY'?).