Yes, in ending, we see Devil Devan return to normal Devan. Spaz goes crazy for a second scaring Devan away. Devan runs to the time machine and starts pushing buttons. Jazz shoots Eva's diamond Devan uses to power the machine. The machine blows up and Spaz catches the diamond. (Then a rock falls on Devan )
I also think the time machine is important in the Flashback episode. I think J&S chased Devan back to the Jazz 1 time, and from there, back to the present for the Jungle, Hell and **** levels.