My eyes have been hurting whilst playing Blockland because the Bedroom has been having seizures.
The textures of all the surfaces (besides the grass and tree outside, I think) have been switching between a white texture and the regular very fast, almost like a strobe. Buildings and blocks are fine, just the regular texture. I have not had this problem with slate maps or any other map except the Kitchen, which I have yet to test.
Not that I can't play when it happens, it is just really annoying and distracting.