The items in this game appear according to where you walk, if there is an item near you you will see the UI, in it there are 3 buttons that are clickable, a Green, Red and Blue, the Green one
you will accept to take the item and it will go straight to the bag (it takes the bag in your hand when you accept automatically) the red one you deny taking only that item having the opportunity for you to pass by a similar item again and appear for you to take, the Blue one you will kind of add the item to a blacklist and it will no longer appear for you to take