ZoneBall is a fun and addictive puzzle game with a gameplay similar to the classic jezzball. You complete a level by building walls to break up the playfield into smaller pieces, without being hit by one of the enemies. Once 50%, 60% or 70% (depending on difficulty) are filled, the level is completed.
To build a wall, tap on the point at which you want to create it and move your finger in its direction. When you lift your finger, the wall will be built.