Hi,
Just finished playing the Linux version of this game (x86_64 on Debian Jessie), really a beautiful game. Well done!
However, I noticed two minor issues (they also appear on the 32-bit version):
- During the very first screen before the main menu comes, it always triggers GNOME's message "Return of the Tentacle not responding". I always have to click "wait" in order to continue. I don't know what the issue could be since such messages are supposed to appear only if a window is actually not responding for several seconds. But in this case, it appears immediately after the Unity logo was presented.
- The mouse pointer is always visible as a little white rectangle when it's supposed to be hidden (in cutscenes or if an action is in progress). In any other cases, the pointer is displayed as supposed. This was tested using the radeon graphics driver with and without compositor, not sure if this also happens with other graphics drivers.
PS: I also tried both Windows versions via wine, it works flawlessly without these two issues. As a side note, in wine you have to force OpenGL, otherwise you'll have minor graphical glitches caused by wine's DirectX implementation.
Anyway, I'm looking forward for more of this game :-)