[TOMT][PC Game][2008-2010ish] Pixel adventure game where you're the last hope (or last seed) for a dying tree.

I'm just copying and pasting this from r/tipofmyjoystick so if you see this twice that's why.

If I remember correctly it was on Armor Games or Kongregate, one of those fairly common flash game hubs from back in the late 2000's. I hope to god it isn't a mobile game that was just extremely well put together, but I don't believe it was. You were created in this room by some sort of deity or statue, and just told you are the final hope for this big tree in this village of little guys trying to help this important tree from dying.

I remember you went to a wide range of places, including the sky where if you fell off the glass thin paths you'd fall all the way back down to the earth. You had to go around and solve puzzles, and defeat bosses after acquiring a certain item from certain locations.

Vaguely recall a boss fight with a tree, that the further you got into the fight the more he caught on fire, but I could be remembering that wrong. I do remember it was a tree though, and you had to fight it to escape this hole you fell down in at the far end of this dark gloomy forest.

I do remember at one point you have to get an item to be able to swim, and then use that ability to acquire a feather from a waterfall in the village. I also remember a forest, this dark forest where you could find a tavern and you could interact with the NPC's telling you something, can't recall.

The music was pretty sad too, it didn't have a very cheery atmosphere from what my kid brain remembers. It felt very gloomy.

I have this weird feeling it was called 'The Last Seed' or something similar, but I can't find anything from that search result. It's been ages since I played that game. If any of this info has been helpful, please let me know!