Color Spheres are the most popular type of sphere in Circulate. They can be grouped together so that they pop out, or gathered together into containers depending on the level's objectives.
Stop Spheres are insanely useful. If you click on one it will stop where it is, effectively become a piece of scenery. Stop Spheres are handy for creating routes for your other spheres, or blocking off areas of a level!
UFO Spheres are grumpy things, constantly complaining whenever you push them around. Unfortunately for them, that's just what you have to do in order to guide them to their container. Use Move Spheres to control UFOs.
Click on a bomb to trigger its count down. When it blows up it'll take out the spheres around it. A bomb will continue to move around the level even when it's counting down, so be careful not to blow up anything you shouldn't!
Fire Spheres are hot! They will instantly melt Ice Spheres, but in turn they will be put out and disappear in a cloud of steam. Fire Spheres will also pop Bubble Spheres, so please be careful with them!
Bubble Spheres are unique in Circulate. They are the only sphere type that will ignore gravity and float upwards. They are very fragile and can be popped by a number of sphere types, including Fire Spheres!
These Crystal Spheres are fragile, even more fragile than Bubble Spheres! If they drop from too high up they will instantly shatter which typically signifies the level cannot be completed. Handle them with kid gloves!
Magnet Spheres can be switched on and off by clicking on them. When they're turned on they will attract any other Magnet or Metal Spheres around them. Great for creating big chains to help guide your other spheres!
Dice Spheres are simply crazy. They boing around levels like nobody's business and they might just drive you crazy too! Unfortunately a lot of the time they need to be controlled in containers, good luck guiding them there!
Similar to Color Spheres except that they do not pop out of the level when grouped together. Sometimes you'll need to gather them into containers, other times they just get in the way! They are attracted to Magnet Spheres.
Ice Spheres are the opposite of Fire Spheres. When an Ice Sphere and a Fire Sphere of a similar size come into contact, they will cancel each other out. Large Ice Spheres will put out small Fire Spheres!
Click on a Move Sphere to switch it on and off. An active Move Sphere will constantly follow your mouse pointer. You can use Move Spheres to push other spheres around a level, great for when there's a Meter Sphere present!