Knockback Wars

Hey everyone, this is my map Knockback Wars.
On Knockback Wars your objective is to knock the other players into the void.
I had trouble setting the spawn because i'm not good with commands. You spawn inside the arena and there is a tower with ladders that you can climb. That is how you get inside the real spawn.

Additional Notes

If you don't know how to make sticks like that, I will tell you that I used the All_U_Want Inventory Editor Mod.
If you would give me a diamond I would love that. But i'm not telling you to.
This is my first upload ever so I hope everyone likes it.