Hey AaPa, I liked your variety of selections! Nice job. I think you've got some really awesome elements in these songs. "The Sunken Rower Theme" would be perfect for a Noire Mystery genre. The solo guitar song could easily be in the background of a dark emotional game. My personal favorite is "Village In The Mist," that song is actually really close to being complete because it is such an enjoyable melody to listen to.
Definitely some Reverb is missing, that will breathe life into each track if done delicately. Usually learning techniques to add realism to your tracks is a lot easier than developing good melodies and memorable music, so you are just a few steps away from getting your songs ready for in game use.
My suggestions in addition to Alec's points about automation: First, focus on learning a couple of new techniques well. For example, maybe start with learning how to use reverb better with the use of some tutorials. And then work on getting strings to sound more realistic, which is a huge priority for orchestral soundtracks. Second, find a few songs that you want to measure up to, and compare your songs to them. Maybe even try to imitate the song so you can find out how much reverb there is, or how the instruments come in and out. Lastly, always let your music sit for a bit before you show it off. If you are posting a song just for feedback, that is fine.. however, if you put the song away for even just two days and then return to it, you may hear some irregularities that you can polish up before releasing it.
Great job again, looking forward to hearing more from you in the future.