Almost everything is quite good for a demo, like the visuals and the merging item mechanic.
The jumping feels kind of weird; it feels more like you are accelerating vertically in the air.
I'm also not really sure if this is a bug, but i think this guy is trying to do something else than just grab me.
What i´m sure is a bug is that there's no music playing, based on what Vandal said.
Well, the physics are really slippery and hard to control, and the background cats are nice, but sometimes it is hard to see the difference between the background and the platforms (like this part).
Also, it will be pretty nice if there is any indication that you can jump in the air if you haven't jumped on a platform before (I'm pretty sure that other players couldn't have figured that out by themselves).
And i think that there is a better way to make a lighting effect without making the entire screen bright and dark every time I'm close to a torch. Like using a canvas modulate and assigning a point light 2D to every torch or something since you are using Godot.
I really don't have a lot to say about this game (because, well, this is a demo), but i can say that it is decent visually (maybe you could try making the background images even more shape like, like this or something).
And it has nice music.
Also i got a bit confused when i tried to advance in the dialog because i instantly forgot that it was the enter key (why not make the shift key also the key to advance in the dialog?).
