How to write an interesting mode?

I got the idea to do a quick mode like Run,Jump,Shoot,Live,Die and do not know how to write it to be interesting

I have an idea. Shoot, Run, Shoot some more, don't die, you're gifted.

you need to know a lot of coding too much. Hope you know.

you dont need to know to much coding you can always use the wiki http://wiki.garrysmod.com/page/Main_Page

Rust gamemode? this is wery interesting idea! or quake parody

you need to know a lot of coding too much. Hope you know.