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Block Havoc combines the the frenetic visuals of Terry Cavanagh's twitch arcade classic with Duet's dual sphere evasion, available on iOS and Android.

Hypnotic patterns of rectangles relentlessly converge on the center of the screen, challenging you to deftly rotate your twin circles to evade the spiralling, intersecting waves of hazards.

The fast-paced evasion is spread across five different modes, each with unique patterns to survive.

Block Havoc is available for £2.29 / $2.99 on iPad and iPhone, and is free to download on Android devices.