I downloaded the Linux release build yesterday to try out the new version on my new system.
After extracting it, it would run fine and I played the first few dungeon levels with no problems.
After turning off my computer and coming back today to continue my run, the game would start using huge amounts of CPU/Memory, then crash and prevent me from doing anything with my computer after crashing (when run in terminal via a shell script, the process would not exit, so even though I've lost the window, the game is still using resources).
I'm using Lubuntu Xenial 16.04 (64 bit). Is there anything I might be missing?
Of note is that the x86 build seems to work completely fine. I am certain that I used the x86_64 build yesterday when I ran it.