Nice
Extremely addictive, it could use music maybe, but I would not say it is necessary due to the highly addictive quality of the game, but still, it would be good. The upgrades system is awesome since it allows for a lot of strategy when it comes to what to improve first, as far as going for tons of drones, a few drones that are strong many guns, a few powerful ones and any mixture of these. Because of this, the game has TONS of replay value, and I really just have to congradulate you on a game well done.