two problems that i see is
1. you can buy the last ball before you can get it level
2. the last ball can pop at the start and you get your points instead of going throw the hole level
It seems when you change the game to Night Mode the game will break when the game is refresh. (All point go missing, the level go blank, sub-atomic particles and level go away)
I think it can't be other way. I will ask the developers and I will tell you...