Frozen Glory: Nice! Nice riff, great guitar tone, pretty good mix overall (though at the end during the big cymbal hits it becomes obvious that your master compression is a bit heavy). The only real criticism I have is that I want to hear more action in the strings. You've started off with this really high-energy riff--why stagnate the energy with the sustained strings? The strings are a great idea--especially considering the subject matter--but if they were staccato, faster, and provided more than simply following the guitar's lead (i.e. adding a melody--bringing them to the forefront of what's going on, rather than just another texture), this track would really benefit from it. Try thinking outside of the "4 bars -> repeat -> something else but still similar -> repeat" sort of form. Instead, always sit back and listen while you're writing as if you were an audience member. When would they get bored? Why are they getting bored? Writing and arranging are all about that. Manipulate the audience's attention span via keeping the energy of the track up and keeping them guessing, and baby, you got yourself a stew.
Tour de France: Since it's a cover there isn't much to say in regards to writing, but the mix is a bit less clear than the last one. Consider taking the drums down a bit--the cymbals and hi hats are fighting with the guitar. And try cutting around 300hz on your master output to help open up both the low and high end. I could go in to more detail in regards to mixing if you'd like, but I don't know your current knowledge level.
Overall, nicely done. A couple tweaks and you're there. I can't wait to hear your newest piece!
