There's no "real" secret ending, and the toast is just decoration, but if you're that dead set on seeing everything there is to see in a level... have i got something for you.
Aside from the detector, there's one other powerup you don't actually need to have in order to beat this level. There's a little easter egg waiting for you if you reach the machine without getting said powerup. Nothing too impressive, but it exists and it can be achieved.
There's gonna be a few tricky jumps along the way, though.