I really liked playing and got 3rd place (at the time of this comment!). I liked the power-up aspect at the end of each level but even though I always picked bullet speed, I kept wishing I could shoot more bullets faster. I also think the camera drag made it more difficult to properly dodge the bullets sometimes, or maybe I'm not not very good at shmups :)
I checked the github link but the repo was empty, but I'd definitely love to check out the source, especially the leaderboard stuff. A few months ago I played around with a really simple python flask approach, but it never really left the 'toy' phase.