Goal
Match identical numbers to clear all pairs.
A concentration-style time attack shaped by 2-second flashes and miss penalties.

Memory Lock is a concentration-style memory card game where uncleared cards flash for just 2 seconds. Wrong pairs add time instead of ending the run, and each extra flash also adds a penalty. Decide when to trust memory and when to reveal again for the fastest clear.
Match identical numbers to clear all pairs.
Uncleared cards flash for 2 seconds.
Some cards are rotated 180 degrees.
99 stages total. Every 11 stages, the level increases.
| Level | Stages | Pairs | Cards | Must rotate |
|---|---|---|---|---|
| 1 | 1–11 | 4 | 8 | 0 |
| 2 | 12–22 | 5 | 10 | 0 |
| 3 | 23–33 | 6 | 12 | 1 |
| 4 | 34–44 | 7 | 14 | 2 |
| 5 | 45–55 | 8 | 16 | 2 |
| 6 | 56–66 | 9 | 18 | 3 |
| 7 | 67–77 | 10 | 20 | 4 |
| 8 | 78–88 | 11 | 22 | 5 |
| 9 | 89–99 | 12 | 24 | 6 |
You must decide and tap quickly right after a flash, training processing speed.
You need to retain brief card positions between flashes, strengthening working memory.
Using the card numbers and positions you remember to find matching pairs trains reasoning.
Choosing when to use a flash (or wait) trains decision control.
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