There´s no music because I haven´t decided yet. And since I knew you had this tileset according to few of your posts, I thought I didn´t need to include it. Could you perhaps find a music file that might fit the level and send me by email?

I´ll just guide you here on the part where you are stuck.
SPOILER







I left a clue on where to go, you see the tubes around that room? I´m going to make it easier to find the entrance, but for now, next to the 3 crates that are halfway into the lava, there is a secret hole in front of a tube part.

In the other room, there you can find the crate easily. But after you destroy the crate and go back to the previous room by the see through sucking tube, there is a way out.