I'm really concerned about my cats...?

Well I'm only 15, and my family and I went to Disney World to visit my cousins for 5 days (and to relax of course). But my parents (who are cheap) refused to really send our cats to like an "animal hotel" or anything like that. Well, it's not that they are totally cheap, they just didn't have the money. So anyways, we left the cats alone in our house. It was very open and free so they could roam around and what not. We also made sure that they had enough food. The only problem is that they both love to be outdoors at least some times. And a few weeks ago, part of our back gl door (one behind actual back door) got smashed in by a baseball. So my dad decided to just put a piece of saran wrap over it to make sure that it stayed okay until we could get it fixed. It worked fine and everything, but like I said, my cat like to go outdoors, and because we weren't home, one of them (or both) got very angry. This is what we are uming, but we think that one of the cats went crazy trying to get out, because as soon as we returned home, the saran wrap was completely torn through. Also, some pieces of gl that had been cracked were now missing and the hole was a little bigger. We were pretty concerned when we saw this. We looked around the house and realized that pieces of the gl were tered throughout. I'm very worried that one of the cats may be hurt, or something in that matter. They definitely seem a little weird and confused, but I'm not sure whether or not that's because they haven't seen us in a while or not. Neither one of them seem to be in much pain, but I don't know what to do. My parents are convinced nothing is wrong, but I don't know! What should I do?