Tap a level to jump. Locked levels unlock after completion
How to play
Slide mode: Tap a tile adjacent to the empty slot to slide Swap mode: Tap two tiles (or tile + empty slot) to swap, supports any shape board
Every move increases your move counter. Win by matching the target periodic layout
Hint: Full Periodic Table
Yellow outline: this level elements, Green outline: elements currently on your board
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This is the reference periodic table. Your level is a subset layout
Target layout (this level)
Inactive cells are holes in the board shape. Blank tiles are placeholders to preserve periodic layout meaning
Chemistry rules
Alkali metals levels never include Hydrogen
Hydrogen appears only in Group 1 or Period 1 contexts
Labels always match the correct family/subset