I ran into what appears to be a fairly nasty, consistent glitch.
If the game is running through Steam, then when the Steam client is closed, it attempts to close Rise to Ruins as well. However, Steam appears to only be able to close the Rise to Ruins window -- the game continues to run, with audible music, sound effects, and time-of-day-change cues playing in the background. I cannot alt-tab back into the game when this happens, nor get back to it in any way I've found to close it manually.
The only way I've found to close Rise to Ruins, when this happens, is to open the task manager and terminate javaw.exe.
Operating System: Windows 10
System Specs: AMD Phenom II X6 1100T (3.30 ghz), 16 GB RAM, NVidia GeForce GTX 660
What I was doing: Trying to enable broadcasting in Steam while Rise to Ruins was running, which Steam responded to by asking for a restart. I've been able to replicate this glitch by simply opening Rise to Ruins in Steam, then closing Steam from the system tray.