For a novice, these are not bad at all. They all have a grand plan in mind. Twin Shadows begins in a very interesting way and the percussion was done well I think. They could develop the melodies more though.
You definitely have a great sense of what makes a score sound epic but it seems the only thing you lack really various ways to introduce and develop melodies. You developed a great theme in the third one but it needed to be built on and needed some variation. Using the same chords over and over makes a piece boring. Change up your chord progressions and use both major and minor respectively in that sense, switch keys etc. In time though I can tell you're going to be an amazing composer.
Also, your music has great sound quality.