This is really well done! Addictive gameplay loop with well-balanced difficulty. It was super polished, too! Good to see stuff like this in a game jam, and I don't think there's more to ask for. I've second tried the game with 3:25:37 remaining. It's a bit confusing at the heart boss, but other than that, the game is really easy to understand. Well done!!
Other things I like:
- UI looks really nice, especially with the animations
- Nice sound and music, makes the game really fun and enjoyable
- Enemy behaviour closely matches the shape they are, which makes the game easy to understand at a glance
- Did I mention bosses? Nicely done with unique attack patterns
- I really like the neon colour palette
Suggestions:
- The effect should be more pronounced when getting hit. With everything is going on, it's hard to notice being damaged at the moment
- Given how fast the game is, it's a bit hard to read item descriptions. Consider using icons and pictures
- This may contradict the point above. I would appreciate the description text for the power-ups being shown all the time, not just visible when they are on screen. This should make decision-making much easier
Anyway, I think this is a really well-made game. Well done!!