Geez, that boss doesn't play around in that third phase!
A fun, perfectly-paced and scoped jam game. I enjoyed my time with this. I do wish I could destroy the mini-robots he sent out to attack. Don't make them one hit kills or anything, but I would have like the extra strategy of focusing on them or just moving around them.
You didn't really indicate it to the player in the directions or gameplay, but it appeared I was invincible during the dash, because that's how I'd dodge the larger laser beams. A small sprite shift, even if it was just the color, would help a lot in relaying that to the player.
Overall, great work. I'm glad I got to play it and I hope your team continue to develop games.