Mouse over buttons to get a description of what they do.
Click the center to gather resources. Once you have at least 10 you can craft a chest by clicking the workbench. Open the chests to gather a reward. Chests will reward you with either a higher tier resource or xp. Get 5 resources of the tier above you to advance to the next tier.
When opening a chest that is the same tier as you a higher luck level will increase your odds of getting a next tier resource. When you soft reset your level will turn into luck, and everything else will be reset.