Monster is coming

My first Unity game. The game is about a man who must collect as many treasures as possible. You control the man with the arrow-keys or WASD. Press space to jump. Press escape to go to the end screen. The man gets damaged when he hits a cactus or is caught by the wolf. The wolf will speed up every time you find a treasure chest. If you dont find the chest within 10 seconds an arrow will appear and show you the way - but you will get more points if you find the chest before the arrow appears. You...