The fourth version of Assembler â€“ A physics based puzzle game in which you assemble shapes. Assembler is a game in which you use the mouse to arrange a set of shapes in a configuration so that the green key shape(s) are inside their respective zones. To get it right, the key shape(s) have to be supported completely by the other shapes, with the mouse released. You are given a score based on how long it took to complete each level, and how many times you had to click. Assembler combines both relaxation and spatial thinking in an easy to pick up and play game.