☄️ Akmon

Left and right turn the ship; up fires its engine. Hold Space or Z to shoot, or turn on auto-fire (🔫). Hold down or C (or the 🛡 button) to raise Athena's aegis. X, Shift or 🌀 is Hermes's jump. M turns the music on or off, P pauses, F goes full screen. With a finger or the mouse, hold on the sky: the ship turns to it and flies there; tap twice quickly to jump.

• Break every stone to clear the wave. A big stone breaks into two middle ones, and each of those into two small ones. The sky has no edges: fly off one side and you come back on the other, and so do the stones.
• Athena's aegis turns stones, shots and hunters away while you hold it up, but it runs down, and each stone it turns costs a little more. Let it go and it fills again; once it runs out, it has to fill a quarter of the way before it rises.
• Hermes's jump takes the ship out of the sky for a moment and sets it down somewhere clear.
• Hunters come now and then: the Harpy (purple) is slow and shoots every which way; the Stymphalian bird (bronze) is quick and throws its feathers straight at you. They break stones they fly into.
• Small stones sometimes leave a gift: Poseidon's trident (🔱, three shots at once for 15 seconds), an amphora (🏺, the aegis filled) or, rarely, a laurel (🌿, one more ship). Fly into it to take it.
• You have three ships, and one more every 10,000 points. Each wave has more stones (4, 6, 8, 10, then 11), a little faster, and the music speeds up as they thin out.

Big stones 20, middle 50, small 100; the Harpy 200, the Stymphalian bird 1,000.