Finally managed to get both endings, this was a fun but punishing platformer.
Took me ages at the beginning to discover that the player can double jump (I think you never mentioned it in the instruction part) so I was trying to jump on top of the meteorites as they fell down and died a lot (it looks like you should be able to jump on them because they are square, so maybe making them round would be better?). To me it seemed a bit unintuitive that touching the top/sides of the meteorites would kill you, so maybe its also possible to make them look more dangerous somehow (eg. sharp edges pointing out)?
I liked the music and the abstract feel of the game, though I personally don't find the colour scheme that appealing. The player character was cute and I like its animations. Also great job on incorporating environmental storytelling, that's definitely an idea you could develop further, I think. Like it would be interesting to find out the bosses (I like its design would have been cool to have seen more of it) and meteorites connection to the 'apocalyptic chaos' as you mentioned.