So you collected a bunch of resources, but how to find them?
Just look for a building with a blue roof
   Or just tap on the icon at the bottom left corner 
   Then the window with your resources will pop up where you can find categories and all of your resources with their count. Also, here you can sell them for Stars (just tap on it, select a quantity, and press Sell), It is a great way to free up some space as well as level up.
   Not enough space? Press Upgrade at the bottom!