After i attempted to patch some things into minecraft pi edition: i came up with something wierd: i just double-click on it, select execute, and it works!
so now i have had some fun, and custom made a desktop launcher icon.
so, it proves that I do not need terminal! lucky me.

I'm happy to help.
https://www.raspberrypi.org/forums/viewtopic.php?f=78&t=51794 - List of games that work on the Pi.