BeagleSNES is far more than a Linux distribution that boots into an emulator. The emulator has been profiled for these ARM platforms and modified for performance. The GUI front-end is integrated into the emulator itself. The kernel has been patched to make the system run specifically for this purpose (i.e. if performance was too slow in user space, it was pushed out to kernel space). The SNES9X emulator that BeagleSNES used as a base runs quite slowly on these boards without the modifications that were made to BeagleSNES. The reason that BeagleSNES runs as fast as it does is because the kernel, bootloader, and emulator are all modified to serve a single purpose. The underlying distro, libraries, file system, etc. does not have much impact on this. This is why the source released for this project includes kernel, bootloader, and application code. The full system image is provided for the convenience of the end users to assist them in getting the system up and running quickly. I'm disappointed that this project would be viewed as only a distro that boots into an already existing emulator, since far more engineering and research work has gone into this project. Solutions for existing issues on these platforms, like adding USB hotplugging support in user space to work around kernel bugs, have been discovered during BeagleSNES's development and provided back to the BeagleBoard and TI communities. The documentation for the project is well-organized and was prepared with the intention that it will (hopefully) serve as a useful resource for other developers that wish to develop Linux multimedia software for the BeagleBoard-xM and BeagleBone Black hardware platforms.

Linux Mint 64, with Intel i7, 8GB RAM, 2GB nVidia GeForce GT 650M (with latest Linux drivers).

EDIT: My bad, it was actually Steam's fault: it ignores launch options (which are set in the properties of the games). I'm running Optimus so I have to use optirun. It works flawlessly when launched manually.

The part of the game I already played was very nice.
But I had to start sawfish in order to do so.

Sadly it is giving errors with xmonad.
Though double fine have activated my forum
account. I guess I go ask in the forum if anybody else
is having the same problem.

Edit:
I found a comfortable way to switch between wm's.
http://www.doublefine.com/forums/viewthread/9205/

Okay, although the engine (AGS) was recently ported to Linux, game itself is not officially supported by developer. However, I can confirm that it can be successfully played and completed (I used 64bit Debian).

I've encountered few glitches (one when Susan's sprite can not be seen until you move to next screen; another when screen doesn't move along with Susan and you have to reach and open the door by guess). Game also crashed once. I'm not sure if these bugs are specific to Linux version or not, but they won't prevent you from successfully playing through.