I played and rated your game!
What can I say?
You had me at the turtles reference in the high score list!
The game is really well made and polished. I liked all of the different enemy types and ammo types.
Especially the ammo makes it real fun to go on.
Feels like a full fledged game, only had time to play for 10 minutes now but could see myself play a couple of hours.
I would like the difficulty to ramp a bit quicker though. I can imagine the first couple of minutes becoming boring for someone who wants to do run after run trying to beat the high score. In the end I had to run into the enemies to die because I needed to go to work. :)
All in all a very nice game and good job on finally finishing it!