Hello, I'm sorry for the trouble you've experienced. That's not actually a bug but a design choice. When the reaper reaches the button, you need to press space. The same slash animation will surround it and on collision with the button, it will activate. Thank you for your comment. We intended for the start screen to be a small demo of gameplay, but it seems that this is a too unclear way to start the game. We will likely change it in the future.