Move with WASD or the arrow keys, or a plugged-in DualSense / Xbox pad.
Space (or ✕ / A) arms the tile under you; press it again to spring the trap on whatever stands there.
Capture green cubes to leave charges behind — E (or ▢ / X) detonates every charge in a 3×3 burst, and chained greens leave fresh charges.
Never trap a dark cube. Let those roll off the edge. Each one you capture tears a row off the stage — and every escaped cube of any other colour does the same.
Hold Shift (or R2) to hurry the wave. Clear a puzzle flawlessly and the stage grows back.
Camera — default is third-person behind you. Press V for the zoomed-out overhead puzzle view. Rebind under Settings → Controls. Mouse / right stick peek; scroll to zoom; FRONT / R looks ahead.
Advanced: align yourself exactly on a grid-line and you can slip between two cubes as they land. Practise it — the final stage demands it.
Runs on the PS1's own random number generator, 30% mirror rolls,
real cube ratios and frame-accurate roll timings. If a cube is about to land on you, the seam between
two tiles is exactly wide enough to live in.