The end is nearing! I have added a battleship to the game. Here’s what it looks like:

The battleship takes a whopping 8 hits to take out. Now that most units are in the game I’m beginning to get a good overview of the difficulty. One thing I’m gonna change is the ammo capacity. Currently the player can carry 12 torpedos but I’m gonna up this to 16.
The only thing left now is adding an aircraft carrier, test playing it and writing some documentation. I’m confident enough now to announce a release date: June 30. Of course, this is by no means a promise but a carefull estimation.