1) turn left

2) turn right

3) merge (merge current piece into facing piece, with corresponding shift in all rows/columns)

4) swap (jump viewpoint from current piece to facing piece)

5) flyover (view whole board)

In my dream I actually played it several times, some times there was a flyover option and sometimes there wasn't. It was way more difficult without the flyover option!

The merge was the best part! It was sort of like a 1960's movie style drug/Batman/fireworks visual event.