Does anyone know why this happens or how to fix it?

My tier list

Another house i made long time ago.

What you all think

Strange Umbrella

Microsoft Windows XP Unprofessional (windows logo prototype)

A house I've built a while ago. :)

It nicely separates the snowy biome from the grassy one.

It's built with painted Ebonstone.

Showing off player 2 😎

What do you think?

Rockin the Guitar, an Axe like Guitar I made for my Uni project

Spaaaace~

These are background sprites I've created for a game I'm working on at school ^w^ Click on the post to see how the sprites connect. You won't regret it! (personally, I think it's pretty heheh)

Drawn in Piskel using my mouse. Whaddya think?