You can only build games for Ubuntu (no other platforms).The IDE hangs when copying any text 7 times or more (so be very aware of this one, as it may look like 'random crashes').It currently comes with some known issues including: Not only that they're also using FNA3D, the 3D graphics library for FNA, across all platforms for the editor too. They've also changed the editor to use SDL for all input and audio output, which they say fixes some long standing differences between the editor on different platforms and to 'better support modern input devices and new OSes going forward'. YoYo are very clear that they're continuing to only support Ubuntu directly, so don't expect it to work or to get support on other distributions. YoYo Games have announced an early Beta for GameMaker Studio 2 version 2.3.4 that brings with it a new IDE for Ubuntu Linux.
