Cup Head is one of the hardest games, if not the hardest, that you will play and it will remain in your beautiful memory. A game characterized by its old cartoon appearance, simple gameplay, and high difficulty, which makes it one of those different games that will not be repeated.
the story
Cup Head is a game about a fantasy world where cup head lives with his brother the Mug Head in   peace, but the two decide to go and enter the Devil's Gambling Club.
And they were playing a game called craps and winning constantly without losing, and then   appeared.evilTo them and he said: What do you think we raise the bet? Win one roll and I will give you all the riches in the casino, but if you lose I will take your soul: Agreed?
Cape Head did not believe this challenge, and because of his blind confidence in winning, he was sure that he would not lose, and he took the dice and threw it. Magman was crying and saying stop, but it was too late and they lost the bet.
AndevilHe starts laughing at them while they are trembling with fear, and he said: What about your souls now?
evil: hmmm there might be a way. He offered them another deal, and said: If you can collect the fugitive debtors' soul contracts by the next day, I may pardon you.
He kicked them out of the casino and said, "You have until midnight the next day, and if you don't collect all those souls, then your souls are mine." And they ran to the house to look for the old man, as he was their only hope, to get them out of the dilemma they had fallen into.
The Elder has given them magic potion blocks that will aid them in their journey towards collecting the Souls of Debtors.
The game is characterized by its high difficulty, the diversity of its environments, and its simplicity. The game, as a way of playing, depends only on three things, and they are: 
1- Jumping
2- Dribbling
3- fire 
Thus, the difficulty of the game depends mainly on the speed of the reaction in all its stages, and the game contains several types of stages:
1- The stages of running: You will face many enemies and you have the choice to kill them or dodge them, but your goal to win is to reach the finish line. 
2- Leaders stages: Here the difficulty of the game is concentrated specifically, as each leader has a different character and a different way of fighting than the others, and the more you progress in the game, they will be more difficult and need a faster reaction.
3- Phases of flight: It's part of the boss levels where you can fly through the sky using a plane that has the ability to shrink to move faster, and for me it's the hardest type of level.