as written in the text on this page:
"Last Man Kicking IS NOT Last Man Sitting. After the reveal of this game a lot of people asked me if there is a Demo available but I always had to say "no" since I don't wanted to give out a half assed broken Demo version just to show something. So I took quite a lot of time to create this Mini Game called "Last Man Kicking" now and put a lot of love in every inch of this Game to give you a experience that is worth your money!"