A game where you try to fit pentaminos into a given grid. There are 7 levels, each one getting harder than the last. It gets really hard. Just like in real life.

Select a pentamino from either side, use ←/A and →/D to rotate, ↑/W to flip vertically and ↓/S to flip horizontally, and click the desired square in the grid to place down the piece. To remove a placed pentamino from the grid, click on one of its tiles and place it elsewhere or click "Unselect".

• U: Unselect
• Esc/P: Pause/Unpause
• R: Reset board (timer won't reset)
• G: Give up (warns you before actually giving up)
• Right clicking a piece will flip it diagonally

• Tried to get game to pause when window is not in focus, doesn't seem to work
• Some pieces are placed slightly off-center (due to even number of blocks)

Original idea from More Murderous Maths by Kjartan Poskitt Playtesting and feedback from @raptorcode