This was an absolutely beautiful game. The tutorial implementation was perfect and had me prepped for the big boss battle, which ... wow. To have a set piece like this in a jam game is super impressive. And the game was just the right length for a jam. I was able to have an enjoyable experience without a huge time commitment. The sound, particle effects and animations all contributed to a great experience. Those blast streaks and impacts ... awesome.
The boss battle was visually stunning and felt epic, but I didn't feel any urgency as a player because my victory was inevitable. I'd argue that is actually nice for a jam game, so players can see the full experience through, but we all tend to take the path of least resistance and will optimize the fun out of a game if able to. Maybe a longer telegraph before the big blast swirl and a healthbar for the player (even if generous) would have made the fight more intense. And perhaps this was intentional, but I felt bad taking down this boss ... it had a charming face and demeanor. It's almost like I was bullying him.
Overall though, really well done. I think I'm at 30+ games played and rated and this is easily in my top ten. I hope more jammers get a chance to experience this and I hope this is part of a bigger project. This felt like a world I want to explore more of.