I remember it running well when I got it but installed it lately, dunno if it's version 1.1's problem but the screen divides in 2 along with way more lag than I remember

Same problem here. I bought it and then installed it and experienced the same problems. Now I've just reinstalled it and it's still quite unplayable.


Edit: applying the solution for fullscreen also makes the lag problems disappear. I'd swear it didn't work for me the previous time, but maybe I'm wrong.

Anyway, it's working now,