I have the current highscore, 12,660! That was really fun. Shouldn't it be called "Splodey Subs" though? ;) If I have any critical feedback, it would be that you don't introduce all those extra fun mechanics until too late in the game. I was about ready to quit thinking that I'd seen all the game had to show at mission 2-1. I was like, "Oh I see, it's just going to keep reducing my times by 10 seconds every 4 rounds. I'm glad I stuck around though because then you introduced the powerups, the sub torpedoes, the water mines, the sonar mode, etc. I bet a lot of players won't stick around that long at the current pace. Other than that, nice polished game!