About

Pieceproof is a small independent puzzle game. Unlike endless block games with random pieces, every Pieceproof stage and daily board reveals its pieces in advance and is verified solvable by an exact solver before release — so every loss is a puzzle you can still crack.

Game design, code, art, sound effects and music composition: original work for Pieceproof.

• Music rendered with Salamander Grand Piano V3 by Alexander Holm, licensed under CC BY 3.0 (samples processed: mixed, reverb, level).
• Music rendered with VSCO 2 Community Edition by Versilian Studios (CC0 1.0).
• Rendering engine: sfizz (BSD-2-Clause; used offline only, not shipped).
• Fonts: Fredoka and Jua (SIL Open Font License 1.1). Library: PixiJS (MIT).

Full texts: licenses.