Nice, fun shooting game! Had been following your updates on discord, so im really interested where you take this post the jam! In terms of gameplay, i dont have much to add other than what many of the commenters have said.. I like the color scheme and the little animations as the bubbles pop. Once you add sound effects, will really make it addictive :)
Also im really interested in learning the tech you used behind this, which significantly optimized it. I will be reading your postmortem! Good luck on this :D