Heyhi, I have a few notes. I've categorized them by art, gameplay, and misc.
---MISC FEEDBACK---
I really like the music!
You should try a higher resolution font - I'd recommend the Minecraft font.
---GAMEPLAY FEEDBACK---
Jumping should set the player's y velocity to a positive value instead of adding upward force - As it is currently, double jumping does effectively nothing on the second half of the jump, which is where I would want to use it most.
You should try keeping the camera's y level consistent; It looks fine when I'm on the ground, but I can't see below me at other times.
There are some invisible colliders on the stone brick stairs.
I can see how many items I have, but not how many I need, so I don't know what I'm looking for. (I'm assuming I have to collect all the materials to rebuild the boat (Update: I was told there is an end pole, I didn't get there because I thought the level started looping.)).
--- ART FEEDBACK ---
I really like the title menu art.
The sprite art has a bunch of clashing styles, resolutions, and import settings. Some things are outlined, some things are shaded, some things are way higher resolution than others (eg the wooden spikes vs the background), and there's some anti-aliasing blurring on some sprites and not on others.
Some parallax on the background would go a long way here.