I did make the exit, However I left the one coin behind, I have collected coins being circled by a boomer like that, But I didn't have the patience for it this time, Sorry! I like your levels and I hope you keep posting them.
I tried picking up the first coin by going in right off the start but I couldn't make that work and the coileys behind the white gate are gone but the coins are still there!
If you have a way to solve these issues I'ld love to hear it.