Pay money and go back to the past.
Install code: turn-back-time
If you die, you go back to the beginning of level. The money you have at the beginning of the level decreases, and you can't go back if you didn't have enough money at that time.
The first cost is $5,000 and increases by 1.25 times every time you die or go to a new world('2'-1, '3'-1)
ex) first death on 2-1 => $6,250 second death on 2-1 => $7,812