World 10 - Level 9
Five Squared, Squared
This map contains 5x5 rooms, each 5x5 tiles big (hence the title). To solve this, we recommend making a map and labeling each path from room to room with the number of bridges required, as well as the number of boxes in each room. Now plan out a path, keeping a running total of the number of boxes available (subtract how many you need to enter each room, add how many boxes you find in the room) until you have a way that leads through all 25 rooms.
If you need the answer, the following map shows the order in which to cross each bridge using available boxes from A-Y.