The XP Stuff works, I just didnt put an explanation for how it works. But basically, Enemies killed drop XP it can be either 1XP (Blue) or 5XP(Red) Collect the XP drops then head on over to the Synthesis menu, its between the Inventory and Leaderboard icons, It looks like a star. Craft the desired item given that you have enough resources to do so.
Once you have successfully crafted an item, head on over to your player inventory and "Use" the item to gain the effects of that said item. Go try it out
Thanks for playing and also thanks for the criticism