I fixed a problem on my Linux install (Debian Jessie). Posting here for other interested.
Error log is in:
/home/USERNAME/.config/unity3d/Streets of Rogue/Streets of Rogue/Player.log
My log says: "Failed to open BO for returned DRI2 buffer (1920x1080, dri2 back buffer".
I fixed doing this:
http://forums.debian.net/viewtopic.php?f=6&t=12468...
And rebooting