I love this game so much. I was considering joining this game jam, didn't end up having the time, but I'm so glad I checked back to try out the submissions.
The application of the theme of mixing opposites is great. With the story line introduced at the start, I also get a great feel of mythology and legend and power.
I love the graphics. The use of bright colors and the movement of particles is awesome. It's beautiful.
Sounds are fun. Great music choice, plus oddly satisfying sounds for game actions like shooting.
In terms of gameplay, it's pretty great for a short game jam. My wish list would include a way to "win" the game or to get past definitive levels, in addition to the current "see how long you can last" mode right now. The delay between being able to shoot forces you to relax and be intentional about your in-game movement and shooting, rather than just spamming out shots. The buying system for hearts and your super powers is good.
Overall, I got a lot of satisfaction from this game. Try it out if you haven't already!