skein

Guide your alien flock across three worlds, in chapters of two thousand, two and a half thousand and three thousand metres, to Aurora Roost. Each bird in the flock is a glowing streamer on the flier's tail, and it grows as birds join. A short practice flight teaches the moves first. Burst to dive through each hazard; time it so the dive carries the flock all the way through, or a bird is hurt. Skimmers strike early. Five spores make the flock bold enough to tear through two hazards. Every 500 metres, rest at a glowing arch and choose a gift. Every chapter ends on a guardian. Once it comes in there is no rest: it throws strikes, fast bolts and captive fledglings back to back until you break it with clean dives. Home opens only when it falls. A burst through the middle of the safe window is a perfect dive: perfect dives build a score multiplier, and a hit resets it. Once the flock has been home, the gauntlet opens: the same courses with fewer birds, a shorter dive, and no healing.

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