Thalassokrypt

In the mirrored depths of a dark ocean realm, half of each pattern is revealed — your task is to complete the symmetric other half. Tap grid cells to fill in the missing mirror region according to each level's symmetry rule: axis reflection, central point symmetry, or rotational symmetry at 90° or 120°. Two challenge modes test your skill: Check Mode penalizes three wrong cells, while Step Limit Mode ends the puzzle when moves run out. Multi-axis levels create chain reactions where one fill determines three or four cells at once. Toggle a semi-transparent mirror preview for guidance, or disable it for hardcore play. Completing a pattern reveals the full design and adds it to your Pattern Codex. Five game modes — Axis Reflection, Central Symmetry, Rotational Symmetry, Multi-Axis Advanced, and Daily Pattern — are supported by undo and hint items, collectible pattern gallery, automatic progress saving, and customizable grid skins and color palettes.