To close a window, press its application icon at the desktop. You can change the volume by clicking the audio icon on the calmbar (taskbar on the top) and adjusting the slider.
============meditateOS 4 build 3771============ Second beta of meditateOS 4 after 3 months (2.5 being a hiatus). More information on GitHub: https://github.com/ToffeeDude/meditateOS/