Running Minicraft on Debian-based Distros (Screenshots are Ubuntu 17.04)

1. Open Terminal
   
2. Do the command sudo add-apt-repository ppa:webupd8team/java
   
3. Do the command sudo apt-get update
   
4. Do the command sudo apt-get install oracle-java8-installer
   
5. Download either Minicraft+ or Minicraft Deluxe from the previous page.
   
6. Double click to play!

If the above does not work, you can try opening through the Terminal

1. Open up Terminal
   
2. Do the command cd (File Location)
   
3. Do the command java -jar FileName.jar
   

It's good to note that usally an error can be fixed with a restart or simply reinstalling Java.
If you are stumped or something didn't work, try asking the Discord here.