Q: How do I view my purchases of in game purchases from my iPhone

To the best of my knowledge there is no way to do this from an iPhone. You'll need to use iTunes from a computer.

Regards.

Yes, varjak pawis right.

You cannot view your purchases on your iOS devices. You'll need a computer to view your purchases. You can view the name of the titles you purchased, amount and web order numbers by reviewing your purchase history. This article will walk you through the steps:

Seeing your iTunes Store purchase history and order numbers

http://support.apple.com/kb/HT2727

Cheers.