Basically NyxQuest is a nice but quite short puzzle-platformer. In this game you take control of Nyx, a winged girl from the realm of gods in mythological Greece. The world is ending and you have to find your lover, a mortal named Icarus.
A slight detour: In the Greek mythology Icarus was a guy whose dad built him wings out of feathers and wax and warned him not to fly too close to the Sun; then he basically died.
Nyx can fly and soar for short distances. She has to avoid environmental hazards like hot sand, pylons, fire balls and falling to pits, and also monsters like harpies and giant fire-breathing snakes. The ultimate goal of each level is to simply reach the end. Fortunately there are several check points each level.
There are two bonus goals: you can try to find all the hidden relics (holy artefacts) within each level and also speed run the levels. There are 12 levels (+ secret level that unlocks after the main quest), along which Nyx learns new skills. These include the ability to move objects and hold them still, control winds and finally shoot lightning. All abilities add new challenges to the game.
It's a nice platformer with a atmosphere that grasps the feeling of "the end of times". The levels are full of ruins and statues and, of course, sand. For me the completion took some 3 hours, the rest of the 6,6 h experience being taken by trying speed runs and finding the relics I had missed.