GameBoy: Nail 'n' ScaleIn Nail 'n' Scale, the player controls Spike, a skilled climber. The player plays their way through levels of heightening difficulty. In each level, the player uses climbing spikes to navigate through the level to the door at the end of each level. The climbing spikes are also used to break bricks that block the path. There are 51 levels in all, with a boss on every tenth level. Each boss has his own unique weakness that must be exposed by the players