
Stronger Pickaxe - Cost: 500 doge.
Upgrade the pickaxe.

Euphoria - Cost: 1,800 doge.
Replace the Mining Shibe helmets with fedoras for increased tipping.

More Axes - Cost: 2,400 doge.
Supply the kennels with more pickaxes to use for mining.

High Quality Pussy - Cost: 80,000 doge.
Upgrade the kittens webcam to HD.

Blue-Flame - Cost: 450,000 doge.
Upgrade the rocket engine with blue-flame rockets.

Excavator Assistance - Cost: 8,000,000 doge.
Add a doge-excavator to assist the moon base.

Roads? - Cost: 8,800,000,000 doge.
Where doge is going, he doesn't need roads. Give the Time Machine Mining Rig flight capabilities.