Cool
This is one of those I really wanted to like. On one level, I do, because it's obvious you put some work into this and have created a WORKING game, something a lot of people can't claim. It's responsive and it works for what it is. Great job, there. The gameplay needs more, though, to hold player attention, such as a score (typical for these types of games) or a stronger storyline/enemy formation. Also, I'd strongly suggest spelling Annihilator correctly :). Either way, it's a great start and definitely a strong base for future game development. Look forward to seeing the evolution :).