Hi,
First thing first: I love the game, good job, it is quite playable and fun with multiple players.
I have found a problem though, I run ubuntu 14.04 and although the game runs fine on mesa 10.1, it doesn't when you upgrade to mesa 10.2/10.3 it only displays a blank screen.
This is the configuration when it displays a blank screen:
Ubuntu 14.04
xorg edgers ppa:
apt-add-repository ppa:xorg-edgers/ppa
Radeon Driver:
X.Org X Server 1.15.1
ABI class: X.Org Server Extension, version 8.0
Loading /usr/lib/xorg/modules/drivers/ati_drv.so
Module ati: vendor="X.Org Foundation"
compiled for 1.15.1, module version = 7.3.99
Mesa:
OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD TURKS
OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.3.0-devel
OpenGL core profile shading language version string: 3.30
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
Mesa keeps improving all the time and 10.3 brings fixes and performance improvements on many games for users of the intel/radeon opensource drivers, plenty of users update it all the time, and eventually it will land in Ubuntu 14.10, so this problem will happen to more people as time goes by.