Sinker 

Long Description:

The second world war. Its the time to prove your patriotism. Your country is under attack. You being the submarine captain are responsible for stopping the enemy warships from reaching the border. Avoid being destroyed by your enemy. It’s a fight to keep your independence alive.

Use missiles to destroy big warships in one shot.

Controls:
Left or 4 to move left
Right or 6 to move right
5 to shoot
3 shoot a missile

Screenshots: