Lion simulator game: the physics under the fur

It is an arcade lion game with a real simulation behind it, not a free-roaming 3D animal simulator. The lion is driven by actual physics - gravity of 32 m/s squared, a 11.2 m/s jump, a faster fall while you hold slide - stepped at a fixed 120 Hz so a run behaves identically on a 30, 60 or 144 Hz screen. The savanna is drawn with a pinhole projection on a 2D canvas, which gives real depth, but you steer between 3 lanes rather than roaming an open world.

Every sprite is drawn as vector shapes on a 2D canvas rather than streamed as art, so there is almost nothing to download. Entities are recycled from fixed-size pools, so a twenty-minute run allocates no more than the first ten seconds. Device pixel ratio is capped and the particle budget scales down on weaker hardware, which keeps the frame time steady instead of letting quality sink the frame rate.

Keyboard: left/right arrows or A and D to change lane, up arrow, W or Space to jump, down arrow or S to slide, Esc or P to pause, Enter to confirm.

Touch: swipe left, right, up or down, or use the large on-screen buttons at the bottom of the screen. Both input methods are live at the same time, so a laptop with a touchscreen accepts either.

Speed follows a smooth curve rather than steps, climbing from 7 m/s toward 25 m/s over roughly 1400 metres, so it accelerates quickly at first and then flattens. Distance also moves you through 5 difficulty bands - Easy from 0 m (x1), Medium from 500 m (x1.15), Hard from 1500 m (x1.35), Extreme from 3000 m (x1.6), Nightmare from 5000 m (x1.9) - and each band raises the score multiplier, unlocks tighter lane patterns and shifts the obstacle mix toward the ones that must be jumped or dodged rather than the tame rocks. Obstacle rows are spaced by both a floor of 9 metres and your current speed, which keeps the reaction window fair as the track gets faster. The first 60 metres are deliberately empty so you can settle in.