hi, i understand that the game might be confusing. here are some clues : on the left you have to move the little black and red character (the thief) and mange to collect objects avoiding the wizards. in the right top corner it's the shop, you click on the client to see what they are looking for, if you have already collected it, you can sell it by clicking on the item in the inventory in the middle. Hope it's a bit more clear now :)