Super Meat Boy - oh god the pain in my hands

Super Meat Boy - the game we all have known to love as one of the world's hardest video games.

Meat Boy - the main character of the game, he is in love with Bandage Girl. He can handle multiple types of pain, ranging from saws to needles.

Bandage Girl - a girl made up of bandages, she is kidnapped by the notorious Doctor Fetus! The main point of the game is to save Bandage Girl.

Doctor Fetus - the antagonist of the game, he's just an asshole who hates you, and is forever alone. He stole Bandage Girl from Meat Boy.

There are multiple unlockable characters in the game, from which you get if you collect Bandages.

Here are a few:
Steve from Minecraft
Headcrab from Half Life 2 (if you have the Steam Version)
Goo ball from World of Goo (if you have the non-Steam version)

There are also characters you get if you go through warp zones -
Commander Video from BIT.TRIP RUNNER
The Kid from I Wanna Be the Guy (the hardest game known to the internet)

What's your experience with the game?

Couldn't pass the 4th boss, so I uninstalled and gave up.