There are many boats and airplanes are approaching you, use your physics knowledge to defeat.
A small group of the best warriors was called to defense a secret island with a base. The enemy does not know what is waiting for him. The seemingly defenseless island has giant cannons and, of course, the best shooter - you. Destroy all the ships that are trying to reach the island. In time, the enemy finds that the ships are not coming back and sends a much stronger arsenal. How do you deal with aircraft, for example? Aim precisely and fast. Every other wave of enemies will be more insidious. There is a great danger to the world, if the island will be conquered. Do everything you can to prevent it. Have fun.