In "What's wrong?" did you end up with your time machine in a wrong time. To get there, you have gone a long way with many tasks ahead of you.
The task is made from 4 images select a picture that does not fit. Insist you have a job you can get diamonds, you fall through you lose a life. So consider your decisions well.
If you have gambled away all the life you have to wait 20 minutes until you receive a new life. If you have already earned enough diamonds you can convert them into life.
Best of luck!