Building a pallet back yard swing

It's summer time and since our nearest park is about 15 miles away, I am bringing the park to our house. I bought two pieces of rope from the hardware. I slipped it through some tubing we had but you can also buy tubing at the hardware store. I put it in a secured location and placed a slip knot to secure the ends to the tree. 

I had two pieces of pallet that were pretty sturdy. 

I used another pallet and cut it into several pieces.

Those pieces I then screwed into the two sturdy boards. 

Upon flipping over the wood, I discovered a scorpion. Yikes. I never have seen a scorpion before in my life so it was pretty freaky since I didn't know how poisonous they were. I ended up talking to a local and they said they hurt like sin but won't kill ya. Good to know. 

I then set it up just to see if it would work. The rope is a bit far but I wanted it large enough for two people to sit on it, aka, my kids together or two...