Games

A differential-equations puzzle. You're given a slope field and a row of gates; the knobs swing on a timer, so you have to lock each one at the right moment to thread your solution curve through every gate. 36 campaign levels plus an endless mode that never stops getting harder — and a Research mode that turns the timing-lock into a real shooting-method solver for boundary layers and three-body periodic orbits. Progress carries between devices via a save code.

Drag three gravitating bodies and their launch velocities to thread one body's path through a target band. A real softened N-body simulator under the hood, so the chaos is genuine — tiny changes to the start fling the orbits apart. Six levels from a single-sun arc up to the famous figure-eight choreography, each band generated from a known-good solution so it's always winnable. Progress carries between devices via a save code.

Tune the driving frequency of a damped, driven oscillator to push its amplitude up to the resonance peak — without letting it smash past the safety cap. Watch the x(t) trace ring up live while a response curve shows exactly where the peak hides. As damping shrinks across levels the peak gets razor-sharp and twitchy. 6 levels plus an endless mode. Progress carries between devices via a save code.

Nudge the Lotka-Volterra knobs — birth, predation, conversion, death — to keep foxes and rabbits both alive as the limit cycle breathes. Push too hard and one species goes extinct or explodes past its carrying cap. See the orbit in the phase plane and the populations rise and fall in time. 6 levels plus endless. Progress carries between devices via a save code.

A phase-portrait detective game. Read a vector field, drag a marker onto every fixed point, then classify each one — node, saddle, spiral, or center — before the timer runs out. Classification is judged against the real Jacobian eigenvalues, so it's honest. 7 levels from a simple sink to a double-well, plus an endless mode of random systems. Progress carries between devices via a save code.

Run the SIR model as a policy game: set vaccination, lockdown strength and timing, and treatment to keep the infection peak under the hospital line — while spending as little as possible. Watch S, I, and R play out over 160 days, with the infected curve flashing red wherever it overruns capacity. 6 levels plus endless. Progress carries between devices via a save code.