Cannon — the Belt Reset
The Cannon fires every marble off the conveyor belt at once. It's the panic button: when the belt is clogged with homeless marbles and a loss is one drop away, the Cannon wipes it clean and gives you a fresh start without restarting the whole level.
Best use: the moment the belt is about to flood — never after. If you wait until the belt is already full, the run is over before the Cannon can help.
Magnet — the Buried-Color Pull
The Magnet drops a specific box into play from above — or pulls the exact box you need straight out of the tray. It's the answer to buried colors: instead of clearing a whole stack of marbles just to reach the one color underneath, the Magnet grabs the box you want directly.
Best use: when the color you need is trapped under others and the belt is starting to fill. One Magnet beats three or four wasted drops.
Shuffle — the Box Rearrange
The Shuffle rearranges the bottom slots — the boxes and their positions. If the box you need is stuck in a bad spot on the belt's rotation, or the slots don't line up with the color you're trying to clear, a Shuffle gives you a new arrangement to work with.
Best use: when your target box is in an awkward position and you keep dropping strays waiting for it to come around.
When to Spend vs. Save
The single most common booster mistake is saving them for "later." On hard levels, a booster used early to prevent a flood is cheaper than a restart forty taps in. The rule of thumb:
- Belt nearly full? → Cannon, now.
- Need a buried color? → Magnet, don't dig for it.
- Box in a bad spot? → Shuffle, stop forcing strays.
Treat boosters as insurance, not rewards. The best booster is the one you didn't need to spend — but the second-best is the one spent one drop before the flood.
What to Do Next
Boosters solve the emergencies; obstacles create them. Learn the 20+ mechanics — Ice, Pillars, Panels, Elevator floors — and you'll know which emergency is coming before it arrives.