Simple menu, mysterious music, and glowing text. I like! I think the neon effect could use some gaussian blur instead of bi-directional box blurring as the corners are missing some of the blur (maybe 2 pass directional blurs on them?) Minor thing, but just something of note. TBH it looks great without it personally, but thats just me. :)
Menu buttons could use some audio feedback on hover as well. Love that I can customize the heart icon! haha. Aim assist is a good touch too
I Beat the tutorial! Love the punching bag as the tutorial boss. Winning could have a bit more 'flare' to it like some animations or something, but its not a super important thing. Also the music just dies off? Maybe (if you like the silence aspect) you could layer some environment ambience under the music? But again, not something super important. haha.
I Love the gachapon machines / 'gumball machine' effect for picking the bosses and the dramatic music that starts with the boss fight. Fantastic stuff! The UI is simple and effective. A bit difficult to check on your health / boss HP since looking away from your player could spell disaster, so it may be nice to have the Health UI somewhere around the player / boss somehow? Just so that players don't have to divert their eyes from the task at hand to check on the status of their progress, but that could just be me. haha.
The game is quite challenging, but it never feels like the game is to blame, which is always a plus!
It is very clean. I think the fish and the hat were the hardest for me to beat overall. haha. The only major thing in terms of maybe helping players a bit with the bosses, would be to wait for them to trigger *back* to red only once the player has / is landed on a platform. I noticed a couple of times right after I would click to strike the boss It would change on me, so yeah, maybe delaying that until the player has hit the platform may be nice. :)
Overall, a fantastic entry! I had a blast and the vibe is incredible! It has a cohesive identity, great minimalist art style, and tons of variety! Great work!!