BlocklandLauncher.exe is what your run to start your game.
This is like the billionth time I have posted this but, oh well.
Step 1: Open Notepad
Step 2: Paste this code in. start BlocklandLauncher.exe -dedicated -map slate
pause
Step 3: Save as dedicated.bat in your C:\Program Files (x86)\Blockland (Make sure you change the "Save as type" to all files)
Step 4: Double click on that file.
Step 5: Enjoy.
And Spectrum, the BlocklandLauncher.exe is in Program Files. You can't launch Blockland by just Blockland.exe alone. Make sure this BAT file is in the same folder as your BlocklandLauncher.exe
Do this, but put it wherever your launcher is.
It may not be in any of the folders said above, in my case it's somewhere completely different.
It's wherever you installed Blockland (by default it should be C:\Program Files\ or something though).