It was good.
The game was alright, but I've seen this type of concept before: Fly forward and shoot at incoming enemies while dodging bullets. I liked the upgrading portion of it, though. The only part that I didn't like was that I found level 3 to be more of a challenge than the first two levels. It just seemed like you upped the difficulty level for that particular level, so I couldn't get past it to finish the game. Overall, it was good.