Nice feeling game! I played the web version. I like feel of the shooting and the music and sfx.
I was on a track pad so it was very hard to use all 3 mouse buttons. Maybe add those keys to the keyboard too? Also, the enemies felt pretty spongy and the white bullets felt very weak. It's fine if some tougher enemies are spongy, but having ALL enemies be spongy doesn't feel great in this type of game.
It's a great start!