Five words: just click on the rings. The number of rings in the picture is shown on the left side of the screen and each level, three total, has more rings than the last. There’s a “timer” to let you know when dawn is coming, which is when you have to finish finding all the rings in that level. In reality though, you’re being timed for how long it takes you to finish all three levels, and that timer is not shown. If you’re desperate to find that one last elusive ring, you can click “hint” for a bit of help.
To be honest, I was biased against games based on TV shows and movies and also against vampire stories before I even started playing the game, and the game simply reinforced my biases. The rings were so poorly hidden that it was just a speed clicking game instead of a hidden object game (and that’s why I said just click on them instead of find them). Screenshots from the TV show are shown before and after the game, which I suppose are to give a little background and maybe a sneak peek of the show, but it wasn’t necessary and simply made the game look like an interactive trailer. I especially didn’t like how the timer counting how long it took you to finish all three levels, which is what your score depends on, wasn’t shown anywhere during the game. Thankfully, you can turn off the music whenever you want. At least the game creators got something right.
Even though I don’t like vampires, I know how popular Vampire Diaries is, and a show like that deserves a better promotional game. If you really have nothing better to do, you can try it here for free, but I seriously advise against it.