Quick tip ya'll, if the game doesn't run too well (on windows, haven't tried through linux), your PC is probably defaulting to software rendering, which sucks, just add a "-Dsun.java2d.opengl=True" between "java" and "-jar" when running the game through command prompt, should fix everything 👍
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You can also enable it from options: OpenGL hardware acceleration. When this is enabled restart is required. I have now seen one or two computers where it possible does not work so that's why it is not ON by default. If game does not start after enabling it. You need to modify or delete file .oros/oros.cfg from your home directory.