Good game--Overlapping text becomes a real problem
Pros: Simple concept; typing works reasonably well. Crisp animation. Fun.
Cons: When nearing ~100,000 points, the enemies really start overlapping, making some of the words completely obscured. Since one enemy will always be on top, you could fix this quite easily by placing a background behind the words. That way at least one of the obscured words would be guaranteed to be visible.