This game is really fun. I love the idea behind limiting the firepower and it works well in the game. The biggest point of feedback I'd have is in the background -it's super busy and can be a little distracting. I think a plain black background and a handful of the parallaxing stars would work much better while also keeping the play area nice and clear. The slower moving ship is awesome though, I liked having to plan my location in the long-run rather than just zipping around the screen.
Great game!