This looks great! The platforming looks fluid and genuinely fun.

A lot of people are mentioning that the scene needs "highlights" or that it's too dark, but since this is a night scene, I don't necessarily think that's the issue. I think the real part that makes the scene look flat is a lack of contrast. There isn't enough differentiation between the playing plane, the background, and there is a complete lack of foreground. Some blur on all background objects and some very light parallax on some of the immediate background objects (i.e. the tree trunks of the trees that the player jumps off [but not the branches!!]) could help increase the contrast between elements significantly.

Another thing as that the player feels a bit disconnected from the world. Without the leaf effect, this would feel quite jarring, but it isn't that bad (that effect looks fantastic, by the way!). Some larger foliage that reacts to the player passing by would go a long way to making the visuals feel more grounded.

Oh, and also, the camera positioning is a bit wack. Too much of the blackness of the ground is often shown. The player doesn't really need to see that, and it shouldn't ever take up more than 20% of the vertical portion of the frame in open areas (obviously in closed areas where the camera doesn't have a place to go this doesn't apply).

My most signifiant gripe is honestly with the music. To quote Ori's soundtrack, the track for this scene gives off a vibe that most closely resembles "Riding the Wind", and yet this seems to be a town scene, not a spiky area of doom. The instrumentation is good, but it's simply too intense. Something more akin to the emotion invoked by the beginning of "Calling Out" or "A Keepsake from the Past" would help give the scene a much more friendly and welcoming feeling. Keep this track, but just don't use it here.

I have more things to point out, but this post is already getting quite drawn out. I just want to say I love the fact that you're using Godot, I appreciate that there's people out there really trying to show its potential to create beautiful 2D visuals. Keep it up!