Tap unstable atoms to split them into smaller particles that bounce around the reactor chamber. Particles that collide split again, creating chain reactions worth exponential points. But too many particles overload the chamber — you need to absorb some with a tap before critical mass is reached and everything explodes.

Drag your gravity well across the screen to pull drifting space debris into its centre and score. Hold still and the pull grows stronger — move too fast and objects scatter. Rare antimatter chunks repel instead of attract and will push your well off course. Balance attraction and movement across an endlessly drifting cosmos.

Tap to make a cheerful frog leap between lily pads floating on a sun-dappled pond. Each pad scores a point — miss the pad and the frog hits the water. Pads drift apart over time, making longer leaps necessary. Golden lily pads appear briefly and score five points each. Miss ten jumps and the pond claims your frog.