An epilepsy warning has been added to the store page and the intro sequence of every build of the game. This was a massive oversight on my part and was something I've been meaning to add for a long time but never managed to get round to it until now, for which I can only apologise. It should have been in the game at launch, but as this was my first game I overlooked this crucial element.
Again, I'm sorry, and I hope this hasn't affected anyone too badly.