I like the ground tiles

Você podia adicionar um AA nos montes e nas nuvens. achei as estrelas também um pouco estranhas.

@Manupix I understand what you say ... Arranged more or less it, then I'll do another edit darkening whole piece (including the sprite). Thank you so much. :)

@Lucas- & UndeadKnight Please, when you comment something, explain why the criticism. Yeah, that way I like editing and improving it is not very good. Thank you! ;)

Full pixel art there're strange

As texturas não ficaram tão legais

There is a lot more difference between day and night than a (very) slight darkening of some colors. See examples in this old challenge (some good, some bad).