The core loop is a solitaire sorting puzzle: reveal and move stamp cards, match image/category sets under a move constraint, clear the board, then advance to a new layout.
Generated Jun 28, 2026
The solitaire-sorting core is legible and portable, but the main hidden risks are solvability clarity, hidden-information frustration, and whether the stamp theme becomes a real collection motivator rather than surface dressing.
Generated Jun 28, 2026
This is one of the stronger depth candidates: solitaire-style sorting, hidden cards, move limits, locks, and limited spaces can create real planning depth if fairness and readability are handled well.
Generated Jun 28, 2026