Yes, it has been released now! You should be able to play it on Windows, Mac and Linux. For the Linux version, GameMaker Studio 2 only officially supports Ubuntu, but it may work on other distributions. However, it is built for x86_64 architecture and won't work on ARM Linux. (The version of GMS2 I'm using doesn't support ARM – the newest version apparently does, but there have been major changes so it would take significant work to port.) There is a Lovely Launch Discount of 12% off for the next week. Please play it and leave a nice review if you like it. It took a really long time to create this world.