Hippolyta has everything an action game needs, at least for a flash game. Move with "W,A,S,D". In the first game mode you'll have to dodge the branches with "S", attack the enemy with "space bar" and use "W" to jump your horse over the stones. Can you manage to continue with missing even one? If you do, you will have to start from the beginning. It has very nice graphics and good music, but also 15MB and it is very CPU-intensive.