Controls - confusing on first play. Tended to just get shooting in one direction and keep it that way rather than try to work out how to both move and shoot in multiple directions. Clicking on a level to go to would result in large lag, then the level starting up too quickly. I played several rooms before knowing there WAS any explanation text on entering a new room, and I was *never* able to read it... I only saw a flicker of something word-shaped in the center of the picture for a frame or so once or twice. So all the rest of my confusion about how to play may boil down to not being able to read the directions.