Thanks for the nice words and the in-depth review! I agree that the whole game is, in its current form, rather unintuitive and unfinished. That just comes down to us not having the time to polish everything. Initially 10 levels were supposed to happen, we ended up settling for 6. Also the ghost is sort of busted and you can really easily cheese 2 levels with it. However, you don't need ghost to finish entire left side, you can do it just with explosion. Also the shadow knockback was supposed to be used in a few puzzles but we also didnt have time to implement those fully.
As for the boss, he definitely is clunky, but i am happy with how he turned out, seeing as we didnt get much sleep those last few days of the jam lol. And yes, he might be a bit overpowered right now, but at least that gives the game some game time xd. However, he is beatable and i noticed that the more i tried to beat him the better i got at it. So he isn't just RNG and is somewhat fair (not completely fair ofc). Also afert you beat him, a cutscene is supposed to play, but since it was my first time adding a video to a game, i didn't know that for web games its a bit different, and so the cutacene currently doesn't work.
And ofc adding UX features (telling player what they unlocked...) is yet to be implemented.