Played this so much now the screen seems like it's moving when it's finally over. XD The final stage was something else... random factor really makes it a stroke of luck to complete, even if you get better and better reactions the further you go. I feel like the trail and particle effects make it hard to measure into the gaps too, and sometimes you miss a block behind a rain of particles.
Otherwise I really liked this game! Just the right rise of difficulty, and right length to persevere through, with plenty of variation and random patterns that make for endless repetition too. It's easy to get into, and easy to replay. Great arcade-type shooter!