1. install the file (the linux version)

2. unzip the folder

3. right click the executable file and scroll down to properties, and click it.

4. go over to the permissions tab

5.check the box 'is executable'

6. now double tap the executable and it should boot into karlson!

the only thing that has caused bugs for me is you must keep the executable and the other folder in the zip , in the same location

hope this helps!