Hey, first of all thanks for your detailled review and advices on my project !
I tried yours but you disabled comments section so here is my review :
You got an nice idea and story around the theme with cute morals at the end
Gameplay concept is interesting with additions that could makes it feel more empowering like footsteps sfx getting louder, screenshakes for "end-game" or decals on ground when jumping
I can't ignore effort on the level design, maybe you could add more of floating rocks to jump to the second island instead of the floating boat -my god it was hard to sync my jumps to get there-
Talking about jumping : it noticed a glitch where jump inputs stacks on each other while mid air, I thought there was a boucing mechanic first.