Neweegee does pixel things again

[Neweegee]

Yo! I'm back again. You probably remember me because you kinda liked my sprites, or maybe something stupid I did... Or maybe you just don't know me.

But my aim is to become a much better spriter, and possibly a good game developer that can help others with their games.
So as part of that, I started making yet another fangame to practice both of those things at once. It's a small game is based on Earthbound Beginnings that's a 2D platformer. My main focus is the graphics right now, so that's why I'm here.

Here's Ninten's sprites so far. I've had a lot help trying to get the design/art-style straight so far.

Spoiler

I actually don't know what exactly what Ninten's jump animation should be, but right now, it's a front flip.
I'll take any suggestions.
<- Jump
To get a better idea how it's all supposed to be used, here's how the sprites look in-game so far

Note: I'll deal with the tilesets and backgrounds at another point, since I don't know if this area should even look like this.

This here is a very WIP Mech planned for the game. Obviously based on one from Kirby Planet Robobot

Spoiler

That's all I've got now. I hope you like it so far, and tell me everything that needs to be improved.