Let other's know the hardware you're using and how you install/upgrade.
Then give your tips.
I have a NVidia GEFORCE GTX 750 TI graphics card.
I installed 0 A.D. using Synaptic.
Added it to the quick links bar at the bottom.
When I click on the icon, the window is bigger than my screen and the mouse doesn't match what I click.
Solution = Alt+Enter removes it from full screen mode to window mode.
Everything works great from there on out.