The filler

A puzzle of space, played with one finger. Press and hold to grow a ball, and let go before it touches anything. Every ball you place claims a piece of the field. Fill the field to finish the level, and spend as few balls as you can: the ones you never use become your stars. HOW IT PLAYS: - Press and hold in open space. The ball grows while you hold it. - Let go before it touches a wall, another ball or a hazard. - A ball touched while it grows pops and is gone. - A press on something already there costs you a ball and grows nothing. - Fill the field to 100% to finish the level. WHAT GETS IN THE WAY: - Drifting hazards cross the field at a steady pace. - Fast ones leave less room than you think. - Erratic ones change direction on every bounce. THREE CHAPTERS: - An open field first: one, two or three colours, each filling its share in turn. - Then coloured areas, where only their own colour may start a ball inside. - Then areas that move, drifting and closing as the round runs on. - 270 levels in all, and 270 challenges beside them. CHALLENGES: - One ball, one target: grow a single ball to the size the round asks for. - Packing rounds: a handful of balls, and more than a full field to cover. - Opened by the stars your levels earn, and worth no stars themselves. STARS: - Three stars for finishing with balls to spare, one for finishing at all. - Stars open the challenges, and 60% of a chapter's stars open the next chapter. LEARNING IT: - A walkthrough plays over a round of its own and points at what matters. - How to play is a page per rule, open from the title screen whenever you want it. - Every level says what it is asking for, in one line. ALSO: - Five languages: English, French, Spanish, Hindi and Chinese. - Sound and vibration switch on or off without leaving the round. - Lose a level and an ad will hand back a full stock. Never required, never asked for twice. No timer. No lives. No streak to lose.