I had absolutely no expectations for this movie. I found out there was a Ted the Caver movie, and saw it was on prime, and immediately watched it. When it first began, I thought it was going to suck. Every scene outside the cave looks extremely cheap and amateurish. Once they get into the cave, however, it starts to look more like a real movie.
The cave sets look really good. I'd believe that it was all shot in a real cave, but then some of the shots they got would be impossible. The acting from our leads is a little corny, but this is a very low budget horror, so it was really just as good as it needed to be.
There's some good suspense, but some annoying "it was just a loud noise" jump scares. The jump scares are the worst part of this movie. They're effective, I jumped, but they felt really cheap for the most part. And they were far too frequent. There's a few other problems, such as a character who only exists as a McGuffin to get our leads back into the cave.
If you're an expert on Ted the Caver, you probably won't like it because it does deviate from the original story. If you're like me, who read the story 10 years ago and forgot about it until I stumbled upon this movie, I think you'll enjoy it. Big recommendation, I think this is truly a hidden gem.