Iam having the exact same problem as you Wacky, the bombs explode before reaching the gate, Got up the hill to the left and found a new dominition spell, tier 3 and then there is this bridge
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Hey,
I don't know if this will help you in the slightest, but the door on the right of the screen in your first screenshote. Well, I got my minions into the statue. I then went into my tower and when I teleported back to the Dwarf land, my mistress told me King Goldo was back. So, I went up to the door and I was let in.
I hope this helps and sorry if it is not clear.
but did you get through that gate? or the bridge
nope I also heard from the mistress I think that goldo is in the angeline keep or something like that do you know where is it?