Highly polished, short but satisfying adventure.
You can read about the game and its story elsewhere; I want to use this short review to assure curious gamers that NyxQuest is a high quality game in every way. Nyx is a joy to control, the puzzles are designed well and have a nice variety of challenges, including collecting 20 artifacts along the way. Over the Top Games have added a "level select" area that makes it easy to go back and explore favorite levels or collect artifacts you may have missed.
Some will complain that NyxQuest is too short, but I am not one of them. So far I have spent exactly ten hours exploring ancient Greece, and will probably go back to visit once in a while simply because it's fun to fly around in this gorgeous game world. While it lasts, the gameplay is very satisfying. Do yourself a favor and check out this excellent game.