A target for practicing aiming sport or game projectiles, such as balls, hockey pucks, arrows, etc., is formed of a large, flexible sheet whose upper edge is temporarily secured to the lower edge of a conventional garage door when the door is lowered. The sheet is deployed to cover the garage door opening when the door is raised into open position. The sheet contains target markings which may include holes in the sheet for receiving propelled projectiles aimed at the target sheet. The target holes may be backed by pockets which receive and temporarily hold the projectiles which pass through the respective openings. The target holes may be normally covered by retractable flaps.