The shop's 'Extras' tab sells an assortment of useful tools and consumables.
Permanent Boosts
Golem
Allows Diggy to move stones over more tiles in just one click!
Price: 200 
after level 5, or 100 
after level 20.
Buy this with copper ASAP. Once bought, clicking stones will give you a choice of how far to drag it.
Before buying the golem:
After buying the golem:
Professor's Switch System
Allows you to instantly switch between storing a lot of energy for the night and enjoying high regeneration speed for while you're playing.
Price: 250 after level 27
Details at Professor's Switch System
Last Tile Finder
Missing the last 10 tiles or less in a location? This extension will help you find them!
Price: 250 after level 30, or 50,000 
after level 50.
Details at Last Tile Finder
Experience Booster
Up to 10% chance for double experience when digging tiles.
This is purchased in ten levels; each one slightly increases the odds. The shop entry also shows which level you're currently on.
| Level | Cost | Odds |
|---|---|---|
| 1 | 200
|
1% |
| 2 | 207
|
2% |
| 3 | 214
|
3% |
| 4 | 221
|
4% |
| 5 | 228
|
5% |
| 6 | 235
|
6% |
| 7 | 242
|
7% |
| 8 | 250
|
8% |
| 9 | 250
|
9% |
| 10 | 250
|
10% |
Total cost: 2297
Energy Saver
Up to 2.5% chance to get 100% of the spent energy back when digging tiles.
This is purchased in ten levels; each one slightly increases the odds. The shop entry also shows which level you're currently on.
| Level | Cost | Odds |
|---|---|---|
| 1 | 200
|
0.25% |
| 2 | 215
|
0.5% |
| 3 | 230
|
0.75% |
| 4 | 245
|
1% |
| 5 | 260
|
1.25% |
| 6 | 275
|
1.5% |
| 7 | 300
|
1.75% |
| 8 | 300
|
2% |
| 9 | 300
|
2.25% |
| 10 | 300
|
2.5% |
Total cost: 2625
One-Click Children
Only available on the web version.
Collect all godchildren from a friend's camp at once.
Price: 95 after level 12, or 220 7000 after level 39.
Holland System
Only available on the web version.
Upgrades your Windmill limit from 5 to 8.
Price: 120 after level 25, or 80 
8000 after level 40.
Rotor Enhancer
Only available on the web version.
Increases the energy per hour from windmills.
Price: multiple levels available.
Details at Rotor Enhancer.
Consumables
Green Rings
Exchange them for treasures in the Chambers of Fortune.
Price: Two for 50 or ten for 220 .
Details at Green Rings.
Speed Potions
Drink it to speed up walking, digging and stone dragging for a certain amount of time.
Price: 1h for 20 , 72h (3 days) for 40 , or 168h (1 week) for 75 .