Thank you! I'll credit you both on the page AND ingame incase People don't read the credits on the game page. I've done that second thing before, where I'll get a game either for free or from a bundle I bought, and I'll read a bit of what the game is about before downloading it to make sure I like it, but I won't read the credits on the page if they're on there.
Edit: Forgot to mention this, but I kinda found a few other backgrounds that I'll use too since they can also be used in commercial projects, BUT I'll still use these for scenes that the other backgrounds I have don't work for. Both are useful to me!