plants vs zombie

Does it give any error message at all?

Try doing a clean boot

http://support.microsoft.com/kb/929135

Just to be sure:  Launch it from inside the Origin Client not from a shortcut file on the desktop.

Run Origin as Admin.

I almost always ignore game questions that are really vague about platform.  The author originally posted in "Other EA Games", and a moderator arbitrarily plunked it down here.  It very well might not even be a Garden Warfare question at all,  who knows. 

Oh I see.

Probably not GW then.

If it's iOS then you need to hold down the circle button and close all apps.  Now try relaunching.  Still no?  Uninstall it and reinstall it from the app store.

If it's android.. same different, close all running apps and try launching.  Still no?  Uninstall it and reinstall from app store.

If it's never worked on your Android device before... it might not be supported?  If you have root you can tweak on it with GLtools to probably get it to work (this isn't going to be a walk in the park to figure it out).. surprised it let you download it at all though if it isn't supported.