Note about controls: We noticed some people were a little confused about how to use items, and we wanted to mention that you must click an item only once, and the item to use it on once to combine them. Double clicking an item will use the item itself (such as toggling letters etc.), or otherwise cancel the selection. So if you double click an item and then click another item it will not work.
This is because the item check cancels when two incorrect items are selected.