Bonus levels are unlocked every ten levels if you have achieved 3 stars on all games.  To access Bonus Level 5, you need to have 3 stars on all regular levels and bonus levels.

Bonus Level 1

1. Upgrade camp
2. Clear to gold stump and fishing
3. Build druid's tent
4. Remove lizard man blocking the farm and then mine
5. Repair the mine and collect ore
6. Repair the farm
7. Fish as available
8. Freeze time bonus
9. Repair bridge
10. Clear to gold shaft and repair
11. Remove the boar
12. Remove lizard man blocking the ladder and repair
13. Repair mine and collect ore
14. Use extra worker bonus
15. Clear to island and over to dial-capstan
16. Watch quantities; no warehouse
17. Run fast bonus
18. Remove 2 lizard men
19. Operate capstan
20. Freeze time
21. Repair bridge
22. Get the hammer
23. If you are having difficulty with food, consider upgrading the farm before building the first bridge

Bonus Level 2

1. Build workshop
2. Use extra worker bonus
3. Rollo can remove spider
4. Upgrade workshop
5. Build gold shaft
6. Remove spider blocking farm
7. Build farm
8. Remove wolf on left
9. Upgrade farm
10. Remove spider to the right
11. Upgrade gold shaft
12. Use freeze time bonus
13. Talk to the herbalist
14. Extra worker bonus
15. Upgrade gold shaft
16. Clear big rock
17. Freeze time
18. Talk to giant for 12 food, 15 gold

Bonus Level 3

1. Use extra worker bonus
2. Clear to rock at bottom and renewable before building
3. Build workshop and upgrade
4. Remove ghost at top
5. Build farm
6. Build gold shaft
7. Remove ghost at one o'clock
8. Upgrade gold shaft
9. Remove metal head (6 food, 10 gold)
10. Upgrade farm
11. Pick up metal (7 food, 7 gold)
12. Remove dark knight
13. Remove evil stone to make path to next metal head
14. Remove next metal head
15. Don't worry about the bottom right resources

Bonus Level 4

1. Build farm
2. Clear over to food stump
3. Wait on the lizard man
4. Extra worker to pick up resources
5. Pay lizardman blocking gold shaft
6. Build gold shaft
7. Pay lizardman at top
8. Use stump respawn bonus
9. Try to cross the bridge
10. Repair the bridge
11. Upgrade the farm
12. Clear path to cave; you do not need to clear above the bridge
13. Use extra worker to clear and upgrade the farm
14. Tub in lower right cave costs 6 food, 10 gold

Bonus level 5

1. Clear over to the workshop
2. Build and upgrade workshop
3. Build the farm
4. Clear to the upper left
5. Build the farm
6. Build the gold shaft
7. Use x2 bonus
8. Upgrade a farm
9. Feed the dragon (3 times for 10 food each)
10. Upgrade gold shaft
11. Upgrade farm
12. Remove huge rock and black knight at the upper right