I just searched in the marketplace from my phone for "modern combat" and it pulled the game up. Downloading the trial now which I'll obviously buy but I always do the trial first.
I gave the demo a go, but I had to quit after a couple of minutes. It's just too hard to play these games (shooters) with a touch screen. Maybe I'll buy it when a controller is out and supported, but I can't do this without one.
Its easy to controll!
You can go into settings and adjust the controls. There are three options.
See which one is best for you.