Touch: hold the left half of the screen to pitch the nose up and the right half to pitch it down, or drag up and down; hold BOOST (bottom right) to fire the rocket · Keyboard: Up/Left or W/A to pitch up, Down/Right or S/D to pitch down, Space or Shift to fire the rocket, Enter to launch, P to pause, M to mute
About:
A Leetdom original in the spirit of the 2000s Flash launch-and-upgrade classics. Nuk slides down a ramp and launches; in the air you tilt to trade height for speed and back again, and every flight earns cash for distance, height, top speed and the fish you catch.
The first journey is the original one: 6,000 m across the snowfields, pine woods, a blue glacier and a frozen sea to the Aurora Isle. Reach it and the Great Expedition opens: five more journeys, each launched from the last one's station. Puffin Post is an island chain of updrafts and fast cloud lanes. Blueglass Pass is a glacier of blue ice, shaped jumps and springy drifts. Whalesong Reach is open ocean, where whales blow you skyward if your timing is right and a fast, flat seal skips like a stone. Stormlight Station is a storm coast of headwinds, sheltered calm air and ridge lift. The Great Aurora Crossing asks for all of it, then the climb to the Aurora Crown.
Between flights the shop sells six upgrade lines (taller ramps, better gliders, rockets, fuel tanks, sleds and streamlined suits), with a last tier of each found along the way. There are 40 one-off goals, two optional mastery objectives per journey with a scarf for each journey mastered, a one-slot kit of sidegrade modules, and four fixed-kit challenges. Settings include volume, screen shake, flashes, text size, pitch sensitivity and an optional steady-flight assist.
Everything is drawn and synthesised in code: no image files, no audio files, no network requests. Progress saves in your browser; saves from before the update carry over with every coin and upgrade intact.
Credits:
Made by Leetdom, 2026. Written for Leetdom, and it lives here.
Phone check: 2026-10-04: the Great Expedition update. Live smoke at /play/skyfin on a simulated landscape phone (844x390, real CDP touch): fresh save, flights, report total equals the wallet change to the cent, double taps and reopened reports pay nothing, refresh keeps wallet and upgrades, a pre-update save migrates with every coin and upgrade and opens the expedition map, Puffin Post flown; no console errors, no requests outside the game. A scripted pilot played a fresh save through all six expeditions in the real page (51 flights, every report reconciled). Not yet played by a person on a physical phone. | 4 Oct 2026: moved from slug skyfin to seal-launch (old /games/skyfin and /play/skyfin/* 301 here); per-level kits + wallets and Clear all progress live-smoke-tested at /play/seal-launch.
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