My first iOS game!

Well you can either run it in the simulator or with an iOS device (iPhone, iPad, iPod touch)
Later when you're happy with it, you can do all the code-signing stuff and upload it to Apple for review before getting it on the App Store.

I tested it with the Simulator and it works fine!

To get it on the app store (I have an Apple Dev account) I have to upload the two created folders right?

Before I do this, what files do I need to upload? (Just want to make sure everything is prepared!)

I'd test it on an actual device to be certain. After that perhaps you'll find this thread useful (you're not the first to find the process confusing!):
http://community.clickteam.com/showthread.php?t=66944
Good luck with your game!

This is great help! I just need to know what file I need to upload though, that's all! (Just what type, the .app, the two folders, ect.)

Let's see:
1. Use Product>Archive to build for upload
2. Use Organizer (button at top right)
3. Select Archive button at top
4. Select your file
5. Select Validate (to make sure it's code-signed properly)
6. Assuming it validates properly, select submit

NB You must have set up your app in iTunes Connect first and be 'ready for upload'

So I just ZIP the two folders that were built and upload? That's easy!

XStar - 2 folders? You should just have one file and use XCode's Organizer to validate the archived file and upload it to Apple - it handles all the uploading now.

There is a .app file in one of the folders with the DSYM file. The other folder says something about Simulator files and stuff... Oh, now that I've tested it and all, I need some sort of certificate? A developer certificate? How do I get that and what do I do with it?

I need some sort of certificate to fully develop? A developer certificate? How do I get that and what do I do with it?

Hello?