Prism Parcel

A second rotation axis (Roll) lets spatial pieces occupy new planes. Optional footprint preview separates selecting an anchor from committing a placement, and the two depth layers are visually labeled.

Pack four spatial triominoes into a 3×2×2 volume. The upper six squares show the front layer, the lower six the rear layer. Turn pieces around the vertical axis to fit.

Tap or click the controls. Keyboard: Tab and Enter/Space operate every button; arrows/WASD move where available, R restarts, Z undoes calm puzzles.

Mistakes remain revisable. Unlimited undo and restart recover deadlocks.