Those gems you've been collecting are for spending, and here's what you can grab in the store:
Quick Start - Cost: 250 (1) / 1,000 (5)
Starts your next run deeper underground.
Super Quick Start - Cost: 400 (1), 1,600 (5)
Same as the Quick Start, but starts you off even deeper.
Auto-Pardon - Cost: 950 (1), 4,500 (5)
Caught by the warden? This item will set you free from your first capture.
Trails! Just for laughs there are three different trail types you can buy to add a cosmetic flavor to your tunneling. Bubbles cost 8,000 gems, while the heart and cheese trails will each set you back 24,000 gems.
Extra Pardon - Cost: 18,000
This adds an extra pardon option to the judgment wheel presented at the end of each run, giving you a slightly better chance of continuing your bolt for freedom!
Skip Challenge - Cost: 12,000