Love this game. Don't put checkpoints in the challenge level. It would be silly. It is supposed to be a challenge and that is what it is. Love this game man, keep it up.
I have trained long and hard. I have destroyed many apples. I am the reason children in Africa are starving. I have stolen all the apples and let them rot on my gym floor. I am a monster. I deserve to die.
Suggestion to new players. Find a guild and go through quests on Heroic with your guild members (make sure your guild is good) This will get you a ton of XP and will help you find better equipment.