Ball Trap is a fun and addictive single player arcade game where the goal is to confine moving balls in a small area.
It is played on a field surrounded by wall, with two or more balls that move about in the field bouncing off of walls. The player can build new walls, decreasing the size of active field. The objective is to fill at least 75% of the field and advance to the next level.
The size of the active field is decreased by making new walls that enclose areas without balls in them. To complete a level, the player must decrease the size of the active field by at least 75%.
New walls are built by swiping on the screen up/down or right/left in an active area of the field, at which point two walls will begin to grow in opposite directions. Only one wall may be growing in a field at any given time.
A wall is not permanent until it's "head" runs into another wall. If a ball collides with any part of the wall before the head has run into another wall, the new wall will disappear completely and one life will be lost.