Pfand Pause 2.0 — A Bottle-Return Puzzle

Three matching bottles and seven slots are fictional puzzle rules. The packaging quiz separately explains return and recycling clues, using feedback after each answer. Refunds are simulated, and real return eligibility depends on packaging and shop rules.

Pure TypeScript transitions handle exposed cards, matching, glass sorting and end states. Layered boards are constructed with legal verification paths, then checked through those transitions for availability, capacity and bottle conservation across all twenty rounds.

Input is queued in order, with pending bottles marked immediately and duplicate picks rejected. Restarting or leaving a round clears pending work. This lets animation follow the game state without losing rapid taps on other exposed bottles.

The layout responds to the actual container, including embedded frames. The board, counter and primary controls fit together; desktop and touch layouts are checked separately. Original SVG artwork keeps bottle shapes and packaging cues readable at different sizes.

Completed rounds and preferences are stored locally, with a migration for the revised campaign. Settings include English, German and Chinese, sound and reduced motion. Progress belongs to the current browser and does not synchronize across devices or hosting sites.

The supermarket queue grows more impatient during inactivity, with optional visual and sound effects. Activity resets the pressure, and pausing or leaving the page stops it. There is no time penalty or timeout; the player can keep planning their next move.