Hi eternum,
You have some interesting harmonies going on here, but I would urge you to experiment a bit more with the left hand. For what it is, it's not bad, but you could do so much more with it, it's quite rhythmically static at the moment.
Also, you don't really develop your melodies to their full extent. Try playing it backwards, upside down, keeping the rhythm but changing to notes, keeping the notes but changing the rhythm, there's lots you can do to broaden melodic elements into a better, fuller piece. I listened to your waltz also, and it suffered from the same lack of development. That's not to say your ideas are bad, they're not, only that each time you start a new round of the first or second themes, they remain much the same as the first round.
I would take both of these pieces and see how many different ways I could change the themes, and vary also the left hand parts. The left hand should never really be "just" an accompaniment, it should also have a life of it's own if possible. These are some of the things that make music more interesting, and in that process, you will also learn a lot about what is and what is not possible.
I hope you don't mind my comments, it's just my opinion, but if you do try some of my suggestions, I'm sure you would have fun, and produce some really interesting music.
Good luck
Mark