Build a location map
Remember each symbol together with a region such as top-left, center, or bottom-right instead of memorizing the icon alone.
Match STEM symbols across 120 progressive memory levels with step and time tracking, daily decks, sound, and account-free friend challenges.
Remember every card position, reveal matching STEM symbols, and clear the board in as few steps as possible.
Level 97 / 120
Every two cards count as one step
Remember each symbol together with a region such as top-left, center, or bottom-right instead of memorizing the icon alone.
When a familiar symbol appears, recall where you just saw its pair. Explore an unseen area only when no location comes to mind.
Revealing cards from left to right and top to bottom reduces repeated checks. Random jumping makes visited locations harder to track.
The theoretical minimum equals the number of pairs, but discovery takes extra turns. Build accuracy first, then reduce time and unnecessary flips.
Reveal two cards at a time. Matching icons remain face up as a completed pair; different icons stay visible briefly and then turn back over. Match every STEM symbol to finish.
Revealing two different cards counts as one step whether or not they match. The first card alone does not add a step, making scores directly comparable.
There are 120 levels across Starter, Explorer, Challenge, and Master stages with 3, 6, 8, and 10 pairs respectively. Symbol selections and card positions vary by level.
The timer starts with the first card reveal and stops automatically when every pair is matched. Restart clears the current time, steps, and matched cards.
The current date creates a fixed level and card order, so everyone receives the same deck on that day. It updates the next day and requires no account.
Scan the board in a fixed order and remember each symbol together with its location. When it appears again, recall the earlier position before exploring randomly.
No. After finishing, Invite Challenge opens the header share dialog with a URL containing the deck seed, steps, and time. Friends replay the exact same layout.
It primarily exercises visual short-term memory, spatial location memory, attention control, and information updating. Results also depend on screen size and familiarity and are not a medical assessment.