Fun! I have to admit though spam clicking is annoying it would be easier if it was a keyboard button.

it would be better if you put music!!!!

Not bad for your first game.

I can see you put some effort into it, and noticed how the boss adapts over-time, which is more than some can accomplish. That said though, there's quite a lot of problems. My biggest problem is that the game (for me, anyway) starts without my consent after a small amount of time. When I get a game over, it also restarts without me pressing R or anything else. Another issue is the controls, arrow keys + mouse click, which is annoying for laptop users to use. It basically forces me to cross my hands, and besides which I don't enjoy using the mouse for a gun which I can't aim. You can fix this by including more possible controls (WASD to move) and other possibilities for shooting, such as Z, X and Spacebar.

Keep trying and I hope to see better stuff from you in the future. Good luck!

Boring

To boring, and it's like the old boss games.