The game can be played in WebGL; a Java-based conversion executeable generated by Unity within your browser window. WebGL build is usually updated at least 2 times a week. You can play the game here.
In an alternate form, it is possible to try standalone Windows builds. These will take benefit of multithreading, higher texture quality, framerates of over 60fps, and the ability to save your progress (if progress exists in the build). New standalone builds can appear 1~4 times per month. (Not available yet)
Currently confirmed controls
The game can be played using either a keyboard or controller.