Licenses

The games use original Sparkpond editorial content and a small set of open-source web tools.

Game content

Hangman words and clues, Crossword grids and clues, and published Sudoku pack metadata are original Sparkpond content, © 2026 Sparkpond. Sudoku number grids are factual arrangements generated and validated for the service.

Open-source software

• Astro — MIT License.
• React and React DOM — MIT License.
• TypeScript — Apache License 2.0.
• Vitest — MIT License.
• Playwright — Apache License 2.0.

Fonts and media

The interface uses the device’s system font stack. No remote font, stock photograph, sound pack or third-party game dataset is loaded.