ALL the floor plates have to be pushed down. Use your first cursur to hold down the first plate, the next to hold the next, and then three to hold down the three plates at the last level. Click the triangles to make the stairs to level 16 appear.
ALL the floor plates have to be pushed down. Use your first cursur to hold down the first plate, the next to hold the next, and then three to hold down the three plates at the last level. Click the triangles to make the stairs to level 16 appear.
Aha! That's what was stumping me. Thanks for the tip.