Thank you so much for the in depth feedback. It's really fun to know someone has played my game! I think your high score is higher than mine. Meaning you may just be the greatest Oceaneer: Endless Runner player in the world. :)
Writing better pathfinding for the enemies is also on the list but I'm still figuring out how to make it happen. It will definitely be updated before the 1.0 version of the game.
The emergency blow should work, I use the Z key for it on my keyboard. One thing I found that's interesting is you can use the emergency blow to "jump" over falling depth charges.