Terms of use
Playing and learning
PuzzleVault provides browser games for personal entertainment and an English learning room for self-directed practice, without registration. Use the site lawfully and do not disrupt its operation or other users. The service offers no gambling, cash prizes or financial rewards. Learning activities do not issue an accredited qualification or guarantee a test result.
Availability and saved progress
The site is provided as available. Features and levels may change, and errors or interruptions can occur. Progress is stored locally and can be lost when you clear browser data or change devices. Shared results are personal records, not verified competitive rankings.
Creative work and third-party rights
The project’s original code, artwork and written material remain subject to applicable intellectual-property rights. Familiar puzzle rules or mathematical ideas are not claimed as exclusive inventions. Third-party trademarks and materials remain the property of their owners. Use the contact page to identify a rights concern.
Reading sources and learning material
The English originals follow the source-specific public-domain status or usage conditions shown with each work. Korean explanations, examples and exercises are separate learning material. These terms do not remove rights granted by a source’s open licence. A source’s public-domain status in one territory does not establish the same status worldwide. Source credits do not imply endorsement by the author or original publisher. Use the contact page to report a rights or content issue.
Fair play and links
Do not use automation or modified client data to misrepresent scores as independently verified results. Shared challenge links contain a course and a self-reported target. External sites and services, including the feedback form and sharing destinations, have their own terms and policies.
Advertising and privacy
Basic gameplay does not require clicking an ad or accepting optional analytics. When an advertising service is active, its placement and consent requirements also apply. A reward must be clearly identified before a player chooses to watch a reward ad. See the privacy policy for the current data handling.
Changes and questions
We may update these terms when the service changes. The revision date appears above. For questions about content, use or privacy, use the contact page. These terms do not limit rights that cannot be excluded under applicable law.
About PuzzleVault · Privacy policy · Contact & feedback
English reading guides (Korean) · Sources and usage scope · How guides are made