Simple Sandbox 999

(The photo shows one of the maps in the game, F_Building.)

Simple sandbox 999 is an custom version of the Simple sandbox game series, made by MadnessGames. This is an 0.4 version, meaning it's still an early build of the game. Although you can still control blocks by clicking Q, (By clicking Q you spawn an block) then clicking ESC, getting the cursor on the block while holding the left mouse button, and moving around with the mouse.