I like your spin on the survivor genre! And I like that you can also get permanent upgrades. But I think the constant need to spam click to fire gets kinda tiring after awhile, especially with how it can take awhile to take down certain enemies. And I also noticed that the cannonball's path is actually fixed locally to the player's position rather than globally, making it so that the cannonballs will actually travel with the player's current location (I'm not sure if that's intended but just wanted to point that out). All that said, it has a very good foundation.