The soundtrack in some parts sounds really similar to some CC tracks.

Maybe because they're both by Mr. Baranowski?

They also sound very similar to the original Meat Boy game sometimes.

I need to get me a copy of that soundtrack...

That's what I thought.

Just unlocked Josef and I'm almost through the light hospital.
There is an Au Sable/All of Our Friends Are Dead warp zone. Excuse me while I rock myself to sleep weeping due to remembering how incredibly disturbing those games were.

Which level was that in (level name please)?

Also, I'm at the Hell boss and I'm all liek D: TOUGH MOFO

Level 2-15, light world. Warp zone is named "The Blood Shed".

Oh, that one. Guess I didn't get the reference

Google and play "All of Our Friends Are Dead" and "Au Sable". They are pretty good and free.