Bennu developer Once a Bird has released its iOS puzzler Fold, which requires you to fold (by means of tapping) each stream until there's only one color of each block left. Sometimes that will require unhooking connected streams or sequentially tapping streams to bring colors together.

Half of the levels in each chapter of Fold are free, and the rest of the game and any future updates unlock for a mere $1. Fold works well on mobile, and I can also see Fold easily working with a mouse and definitely fetching some cash to be hosted on one of the bigger browser game websites.

Give Once a Bird's Fold a go on your iOS device.