Thank you so much for playing and for your feedback! I've always liked games with an unlockable "hard mode", so maybe that's where the inspiration came from. I knew it would be cool to be able to play the game backwards from the end, but I wanted it to be harder than just "do the same thing you just did but in reverse", so I thought it would be cool to add an evil red zone of death to race them back to the start. Anyways, I'm glad you found it as fun as I did!