Swipe to Steer
You play as YLO, a drill-bit explorer who digs downward automatically. Swipe left and right to navigate around rocks. Your score comes from depth - the deeper you go, the higher your score. But digging damages you, so you need to plan your path carefully.
Collect Crystals to Heal
Crystals are your lifeline. Digging through earth damages your drill, and collecting crystals repairs you. The key strategy is choosing the shortest path to reach crystals before your damage becomes critical. Special gems like gold and rubies give you a quick nitro boost.
Use Nitro Wisely
Nitro mode lets you move faster and smash through rocks that would normally block your path. It also heals you while active. Nitro does not give extra points - your score still comes from depth. Use it strategically to break through dense rock layers and reach healing crystals on the other side.
Find Your Crew
Your crew from Digger Expeditions Ltd. is stranded at underground checkpoints. Each teammate gives you parts to upgrade your drill: hull (less damage), drill (turning), and engine (speed). From checkpoints, you can teleport back to the surface to spend upgrades at the shop, then teleport back down to continue.