Limbo

You have woken up in darkness and a voice speaks to you. It speaks to you about rebirth and challenges. With no other way than forward, you perform these challenges. You may fail again and again, it will leave a trail of bodies, but for each failure you learn something new. 

Become strong, become fast, gather points so you may buy upgrades from the merchant. Beat the three trials to reach the end. To reach your rebirth.