In 1831 Michael Faraday found that a magnet does nothing to a nearby coil while it sits still — a voltage appears only while the magnet is moving. His law is exact: the induced EMF equals the number of turns times the rate at which magnetic flux through the coil changes, EMF = −N dΦ/dt. Not the flux — its rate of change.
That is why the scope spikes only while your hand moves, and why a faster shove makes a taller spike. Park the magnet inside the coil and the flux is large and steady, yet the trace falls flat: dΦ/dt is zero, so the EMF is zero.
The sign carries Lenz's law. Pushing the magnet in and pulling it out change the flux in opposite directions, so the EMF flips sign — and the induced current always flows so as to oppose the very change that created it. The coil pushes back on your hand; that resistance is where the electrical energy comes from.
The simulation stopped unexpectedly — the lesson continues without it. You can move on; nothing you did was wrong.