How to play
- Tap a tube to pick up the block(s) at the bottom of it.
- Tap another tube to pour them in. They only fit on an empty tube or on a matching color.
- A tube holds four blocks. Win by grouping every color into a tube of its own.
- Undo puts a block back, but does not refund the move — your count keeps climbing.
- Everyone gets the same puzzle each day. It is always solvable.
Keys: 1–9, 0, -, = pick tubes · Esc deselect · U undo · R restart