Click or tap on a colored orb, then drag through adjacent orbs of the same color to build a chain. Release to clear them.
You need at least 3 connected orbs to clear a chain.
When orbs are cleared, everything above falls down and new orbs fill in from the top. If these create new matches you can chain them for bonus points.
Clear chains quickly (within 2 seconds) to build your combo multiplier up to 8x.
Look for the PRISM triangle orb. Clearing it triggers a Spectrum Burst that removes all orbs of one color.
New colors appear as time goes on, increasing the challenge.