The overall progression and gameplay are really good and it was fresh not to have the limitations that most games give you.

I have obtained most weapons, maxed all my stats, and beat all the bosses I knew of (Sgt. Suckerpunch, The Clog, Ms. Slithers, The Wasp Queen, and Dream Eater)

Btw, could I help with the translation to spanish? Im fully fluent in it since its my first language. If I could help you by making the Spanish translation it would be cool. Im available to do it when you need it :)

My suggestions would be:

Some permanent pets that look like crafting Juice, when killed they faint and you could revive them with Juice, you would level them up and give them hats and specific weapons for them .Some chests you can buy from the Old Man and you can place in the graveyard or other areas for proper extra storage, since throwing out useful stuff isnt really fun, but right now I dont carry with me stuff like the frozen pizza since they permanently stay at structures near the graveyard.

Hats could give some armour protection of sorts.

Support for directional keys in the controls menu.

Maybe some other vehicles apart from Signy's Wheels.

And maybe having other playable characters like Signy, Ingot and Mr Fox (Wich probably dont fit your vision)

I also find the lore very interesting, specially your future self in the Evil Cabin.

Ok so that is about it.

Have a nice day :3