Some of the switches will temporarily open closed bridges, others will make permanent bridges. There is a green and red light to help you see which of the bridges is being operated. Beware of the orange tiles, as they are fragile and if you stand your block on them vertically is will fall through it! There is another third type of switches shaped like this: ( ) it’s function it to teleport your block to a different location and to split your block into two smaller ones. Each of the small blocks can be controlled and they will become one large block again once they will be placed next to each other. Small blocks can operate the soft switches, but are useless for the heavy switches. You also need to rejoin them to get them into the final hole to accomplish the level.