SHIFT is a Sokoban game which you can switch walls and floors. The current version has 16 levels.

Instructions:

Arrow keys to move

"O" (Z on PC) to enable the SHIFT ability. With the SHIFT ability enabled, you could walk into the wall. The indicator on the left up corner of the screen shows the remain SHIFT for current level and a dot showing whether you are in SHIFT state.

"X" (X on PC) to undo your last action.

You could restart level in the menu.

Credit:

Designer: Dan & Gann
Programmer: Dan
Music: Kiro