Easily my favourite one even though the entries were strong! I love the duality of the game and how growing can represent both good and bad things (like growing happiness or growing suffering).
At the 2nd level I was like: "But what's the puzzle?" and I figured it out on the 3rd level when I accidentally collided with "myself" (playing as forever alone, haha). So it turns out I did a perfect first run on the 2nd level without thinking lol. I now realize that the walls were supposed to squish the bad and good sides together, ending the run. It's almost like you're telling me "don't do everything at once, one step at a time is okay".
Spoilers:
You got me at the end though. I went for the bad ending because I baited myself thinking that if the positive vibes devour the bad things we're fine. Yeah, "FINE" like how we oppressed all those negative feelings like nothing, but that wouldn't solve the problem. Letting the "bad" devour the "good" is like making peace with your negative inner thoughts or that's how I interpret it at least (especially how you switch collectibles at the end and the message at the end).
Actually I'm pretty sure i'm not getting 100% of the picture or at least how the developer(s) intended the players to think - But that's great because the game makes me thinking about things and I have a feeling it's up to me, what takes I get from it! At first I tried to place both feelings together in the middle hoping for a "true ending" or something or at least that's the joined slot told me.
The menu is just pure genius - a vibing tutorial at the same time.
And the best thing is the overall game. It's put together, it's FINISHED. This is something you could easily sell with more levels, it's a ready product. Actually, sorry for calling it "just a product", it's clearly already more and I'm not someone who always tries to find meaning even when there isn't.
Everything just clicked with me, a job well done!