A bat navigates a pitch-black cave using echolocation — tap to send out a pulse and the echo briefly reveals the cave walls, stalactites, and hidden gems. Tap again before the echo fades to move toward what you saw. Each cave is procedurally generated and the echoes grow shorter as the cave narrows. Find every gem before the bat's energy runs out.

Trains depart from multiple stations and you draw routes on the map to guide each one to its matching coloured destination without crossings or collisions. Trains move immediately once routed — a wrong line causes an instant derailment. Later maps have eight stations running simultaneously with shared track segments that must be timed perfectly to avoid disaster.

Electrical charges surge through a circuit lab and you tap nodes to reroute them toward the correct output terminals before they short-circuit. Each charge has a colour matching its terminal. Stack charges in a buffer node to release them simultaneously for a combo burst. The circuit grows more complex each wave, adding new node types and faster charge speeds.