Q UB - A minimalist browser reflex game that gets brutal fast

I built QUB over a few weekends because I wanted a browser game that felt genuinely difficult without being unfair. Something you could pick up quickly and access from anywhere. The design direction voluntarily clean and minimalistic. The sci-fi narrative layer emerged later, I was seeking an eery feeling. The premise is that if you get past level 30 you probably have cat-like reflexes. Would love to hear your brutally honest feedback and how far you got. My next venture is to add sound-design to it for greater immersiveness.