Double Resurrection Objective
A difficult objective for some people to get is the Double Resurrection objective.
To complete it, you need to first purchase two resurrections from the store - you can find them in the Utilities section.
You can then start a new run. As soon as it starts, double-tap the screen to use the first of your two ressurections. This is indicated by a pair of wings around your character - these last for 30 seconds or until you die. To achieve the objective, you should die as soon as possible after activating the resurrection. You then, once revived, need to keep running for at least 1000 meters or 30 seconds until you are able to use the resurrection again. Kill yourself for the second time and you will have unlocked this objective.