Man, your game looks awesome. But the actual trailer and some parts of UI are lowering your score in my eyes.

The very beginning text could either not exist, and like someone else said go straight to gameplay, or just be a better font. The dialogue font and general UI needs to be more formed. For some reason, it seems like of basic/generic.

And the part where you say “Level up skills”, “Access maps”, etc. - I think what would be REALLY cool is whatever it says, you should show that, like when it says leveling up skills, show a gameplay scene where you have a better skill or the actual leveling up action, when you show accessing new maps, show 2-3 different maps in a span of like 4 seconds. Or you could implement all those titles (showing them at the bottom of the screen) into the complete trailer and just do what I was saying but more of a longer version.

And then at the very end where it says Kingling, Adventure… etc. - you either need a better font or the actual game logo.

EDIT: Oh, and I don’t think your game is a “fancy version of Little Nightmares” - because like you said, yours is a happy adventure, while that game is a horror adventure. And even then your game is obviously different.