← back to the game. Draw /
Erase terrain with the mouse (click or drag), or import an
image (dark pixels become solid ground). Use Place hatch /
Place exit then click the map to position them. Decor
stamps a scenery prop on the surface (click a prop to remove it);
Pillar drags out a region that the game paints as a fluted
column (click one to remove it). Set the parameters and export the same
levels.json the game loads. Check level runs a
lemming through it with the game's own rules: it draws the walk with no
skills (grey), a solution if it finds one (yellow, with a dot where each
skill is given), and lists what's wrong — a deadly drop from the hatch,
a buried exit, no solution with up to 3 skills, too little time.