This is a really, really good entry for the jam limitation. Having infinite ammo meant I got myself into trouble very frequently, but I always knew it was my fault so I didn't mind at all. To optimize time, I found that as the board dwindled to just a small group of blocks I would spam bullets at them and hope I won before they rebounded, which had that perfect feeling of high risk high reward. Really fun!

I have some small suggestions that I think would help enhance the experience for the player:

There were times when a ball would come at me horizontally so it was difficult or impossible to dodge. This was usually because of something I had done anyway, but it did feel a little unfair. Maybe you could add some sort of a "dash" feature that gives I-frames? It wouldn't need to be spammable. Alternatively, a lot of bullet hell games have "bombs" that clear the screen of all bullets and are limited in ammunition. Just some ideas :)

How you're probably supposed to play: Strategically shoot a few balls, and carefully dodge while they do their thing.

How I played it: Shoot so many balls that the level is over before they can kill you.

I seriously had so much fun with this, it's suuuuch a clever premise and it's nice that it challenges you from a strategy perspective early on, and depending on how strategic you were, challenges you from an action perspective as well. 

You did a great job making this super crisp and juicy with minimal assets, very clever use of your own time. I love it.

The idea is super interesting! Just a little too hard when reaching level 5 - I guess I need more patience! :')

this is really simple which is why it's really fun. the audio was really cool too, especially the lose sound, makes it feel like a game show

This is a very neat take on a brick breaker, but still very easy to understand!

I do think the rotation and movement speed is a bit too fast, but this could just be because I seem to love spamming the spacebar.

I think the risk-reward between the danger and number of bullets is very cool!  Especially the timer encouraged me to try to get as many bullets in play, providing a good challenge!