Can I download games on a ios 7.1.2?

I want to download games on my iPhone 5 c ios 7.1.2 but, IIm afraid.Beacause last time when I upgraded my iPhone into a ios 7.1.2 after 1 week the system was not working anymore. All the data all things that I had in my iPhone was erased.So my question is can I download games maybe?

Yes you can, and if this problem happens again go to the apple store.

I don't see why not. As far as what happened the last time, that's of course not the norm.

ALWAYS, ALWAYS, ALWAYS do a complete backup of everything that is important to you before doing any system updates on your phone.

I backup to the cloud and then backup to my computer. That way there are two full backups of the things I need backed up, text, email, apps, etc. That way if anything goes wrong, I can factory reset, then apply the update, then restore things to the updated OS.