Thanks for the game, had a great time with it. I found it quite well polished, theme was consistent, fit well and I love the little things like having ui to mute audio , the difficulty slider and a boss at the end of the gameplay loop.
I think it was a bit OP to be able to chose when to fire the gun. I didn't read the intro text at first and just spammed the fire button, which was quite fun.
Thanks for the valuable feedback, I'll definitely take it to heart!
Particle systems were not used. The bullets are scripted box sprites (with boxcollider2d and rigidbody for collision detection), being instantiated and destroyed on the fly. We did use Physics2D collision layers.
