Neat!
Nice physics, awesome sea shader and great textures. Also I’ve thrown an eye on the code and it’s amazing how much you can archieve with so little number of lines, and you don’t even use all of the code in the samples.
Shooting seems to be a performance bottleneck, but as for this state, without any optimizations, it’s awesome already.
There still are some bugs and glitches, but as for only ~3 people and the little time you had this is very impressive.
For everybody just looking at this: start with the last menu point: core level without sun. The sun darkens the whole level (what an irony) and slows down things.