There is a window before the game begins where it asks you to login to Newgrounds or play without login. I am already logged in, yet the left choice does not function. I am even using Chrome like you suggested.
You have music/sound effect sliders. However, you should put a test sound effect when you change the sound effect slider.
The game does not have a good survival mode. Only three enemy ship types, with the most vicious one being the beekeeper ones which launch their bees. I always prioritize them over the other types. The game could have added the carriers from the campaign for some challenge/better scoring opportunities.
I managed to finish the campaign, but where’s the ending? It had a decent story for a game like this, but there’s no ending—the player just returns to the level select menu and you get upgrade points as usual.