Reached the final boss, but got swarmed and died. Video:
The guns are very satisfying to use! It's amazing how there is so much stuff happening on the screen yet the game keeps up its performance. Knowing if a gun is better than yours is a bit difficult, having the info boxes so far away made the process a bit annoying. The lasers I got felt underwhelming (and lagged my PC badly).
At the end I got overwhelmed and I'm not sure what I could have done better. I didn't find any new weapons when I wanted to replace the laser and without a shop the runes didn't had much use. Also I kept the shield gun but Im not sure when to use it or how.
The whole game feels very nice, the sound and special effects are very crunchy. Cool game.