Use WASD / arrow keys or tap the pad.
Answer correctly to pick up each key. Keys stay with you, so every lock becomes solvable once learned.
Drag the grid sideways if it extends past the screen.
Mission checklist
Resumed last run
Field log
Mini map
Legend: blue = you, green = exit, yellow = keys, magenta = bad actors. Portal swatches match the tracker below.
Custom mission builder
Use W for walls, . for floors, S for the start, X for the exit, lowercase a–f for keys, uppercase P/Q/R for portal pairs, and H for bad actors that steal keys.