This was super fun, what a great way to start the jam!
The gameplay concept is extremely cool! It's fast paced without being overwhelming, the movement feels very cool and intuitive, and learning to utilize the gravity physics was very engaging. It's got some neat powerups as well, although I think the POW block might be a little too strong, I got some cheap shots off of it a few times.
The UI is very slick for the most part, but I find the fonts and button shapes to be a bit uninspired for how good the rest of it looks. I also originally clicked the Online Multiplayer button only for it to softlock the browser build; a back button would be very nice to mitigate that.
The graphics are pretty good! The art seems pretty consistent, and while the zooming effects do lead to some jaggies, it's nothing that I feel looks terrible.
The music was also pretty strong, it has a lot of energy and it's nice that it's randomized on each round. This is definitely a neat little game, and I think the additional gameplay modes will add a lot of appreciated content for something that would otherwise be a pretty short and sweet deal. Maybe if I can get some friends in on this I'll provide some feedback on the online as well.