Pack It Remix

A polyomino packing puzzle. The case is a grid; the tray holds piece shapes that exactly tile it. Tap a tray piece to pick it (tap again to rotate), then drag it onto the grid and release where it fits. Fill the case with no gaps or overlap to win. Wedge a piece so a remaining one fits nowhere and it's a jam — undo or reset. 10 cases grow from 4×4 up to 8×8.