I did 225.
The physics are cool, that the turrets are simply turning around, still shooting, is cool, you gotta be careful one won't face you when you got past it. Life which can get either too high or too low is a fun idea. The gameplay works.
With this sort of gameplay loop I think the game could speed up as you play, especially since the speed is fine at first but as you advance you get to wish it was more dynamic.
Cool concept, thanks for sharing.