I tried the plane and ship so far, this game would be perfect for young children, 5+. Its almost like your playing in a 3D dream or fantasy world. The quick/ near instant loading times are nice. Glad it's in 3D. The Non-playable characters were funny. Has at least 5 vehicles. Low file size and system requirements. Appears very editable with open source, has variable documentation, and is regularly updated by the author (see forum for changes).