Help with JUNO MAP (simple edit)

[Exonaty]

Hello friends, I need a simple help with this map that I put in the start zone. this arena was very good for pvps, but I'd like someone who knew messing with the worlds broaden editor quite the entrance of the arena and withdraw these hills to leave the flat arena.

 

I thank you.

 

Link to download the startzone:

 

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Photos of the problems:

 

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