Card Shuffle

Each round, three to five real sports cards are laid face-up. The most valuable card is tagged as the target — memorize its position. The cards flip face-down and enter a shuffle animation with 3 to 10 pair-swaps depending on difficulty. When the shuffle ends, pick which position still holds the target. Correct picks bank the target card’s fair-market value (times a difficulty multiplier); wrong picks score zero. Ten rounds per game.

Easy is 3 cards, 3 swaps, 800ms per swap, and a 1.0× multiplier — most collectors can track this with raw attention. Normal is 4 cards, 6 swaps, 500ms per swap, and a 1.5× multiplier — requires following two or three cards through intersecting swaps. Hard is 5 cards, 10 swaps, 300ms per swap, and a 2.0× multiplier — approaches the limits of visual working memory. Pick the tier that’s a slight stretch for you; that’s where spatial tracking actually trains.

Daily mode uses a date-plus-difficulty-seeded run: every player who opens Card Shuffle on the same day at the same difficulty faces the identical card pool and the identical swap sequence, so scores are comparable. You get one daily run per difficulty per day. Free Play generates a fresh seed each game for unlimited replays. Both feed the same lifetime stats (games, best score, lifetime target-tracking accuracy, daily streak).

Pure hit-count scoring (one point per correct pick) would make a $5 base card and a $20K vintage grail worth the same. Using the target card’s FMV as the per-round payout anchors the game in real hobby stakes: the harder rounds tend to pull higher-value cards from the pool, so a correct Hard pick on a $8K Mantle is meaningfully different from a correct Easy pick on a $400 Prizm. Lifetime score tracks total hobby value you’ve successfully tracked through shuffles.

Grade ladder (after difficulty multiplier applied): S = $25,000+, A = $12,000-$25,000, B = $6,000-$12,000, C = $2,500-$6,000, D = $800-$2,500, F = under $800. Hard mode’s 2.0× multiplier is the fast path to S. A perfect 10-for-10 Easy run on mid-tier pools typically lands B; a 6-for-10 Hard run on premium pools can land A.

After the game ends, the share button copies a 10-emoji summary: 🎯 for a correct pick, ❌ for a miss, one per round in order. Plus difficulty label, correct/total, score, and grade. Perfect for dropping into a hobby Discord or a group chat without leaking the specific cards pulled.

No. Card Memory (G-020) is static flip-and-match — cards stay put while you reveal pairs from memory. Card Shuffle is dynamic spatial tracking — cards move, and you must track a specific target through intersecting swaps. The cognitive load is different: Memory uses recall of past reveals, Shuffle uses continuous visual attention during motion. Closer to the classic cups-and-ball con than to any existing CardVault game.

Card Beat (G-077) is rhythm-timing with lanes and beat patterns — audio-reaction. Card Reflex and Card Snap are speed-matching. Card Echo is sequential pattern repeat (Simon-style). Card Shuffle is unique: none of those require following a single moving object through a swap sequence while the other cards also move. It is the only spatial-tracking mechanic in the CardVault game catalog.