Bike Escape From Forest

There once was a boy, and he often went to his beloved grandmother. But the way to her grandmother passed through a very dark forest, and the boy always quickly passed him on the bike. Once he stopped to look at a strange bug, and someone chained his bike chained to a tree. The boy is very scared, because now he is in a dark forest alone and without a bicycle. Help the boy to find the key and set the iron horse to get to grandmother's house.