Did you just make a new icon for blockland? AND Minecraft???
...I love you(no homo).
I took the Mac's Blockland icon from some topic I can no longer find.
Minecraft's icon was the ".jar" icon so I replaced it with that. I couldn't find the original icon but that looked better in my opinion anyway.
Also, I just made that "stuff" folder right before I took that screenshot. My desktop was cluttered with screenshots of stuff from before.