We are terribly sorry that some of you might have experienced some inconveniences with the Store that we just implemented. Now we had it fixed.
If you have any problems, try restart Steam and check again.
If the problems still exist please send us a message at the following and we will get back to you as soon as possible.
Facebook:
https://www.facebook.com/HungerDungeon/
Steam:
http://steamcommunity.com/app/513560/discussions/1/
Sorry about the caused inconveniences : (