I'm fairly certain this is what happened:
1. Downloaded Blockland.
2. Took application out of folder.
3. Put it in dock.
You do not take app out of folder!You do not take app out of folder!You do not take app out of folder!You do not take app out of folder!You do not take app out of folder!You do not take app out of folder!You do not take app out of folder!You do not take app out of folder!
If you use a WINDOWS, however, I have no idea.