Extra Items and Level Select:
 Open the inventory window by clicking on a Storage House.
 Then, click once on the following items. A red triangle will
 appear in the item's square as each is selected.
 
 Row 1 - item 3 - wooden boards
 Row 2 - item 2 - iron bars
 Row 2 - item 4 - wine casks
 Row 3 - item 1 - bread
 Row 3 - item 5 - cooked meat
 Row 4 - item 1 - animal hide
 Row 4 - item 5 - plate mail
 Row 5 - item 1 - axes
 Row 5 - item 2 - swords
 Row 5 - item 3 - lances
 Row 5 - item 4 - pikes
 Row 5 - item 5 - long bow
 
 Then, click on Row 6 - item 1 - crossbow to add 10 of each item to
 your inventory or to complete the current level click on
 Row 6 - item 2 - horses.