Review time!
For Hope and Shovelry: Oh, man, going after Gario on his electronica home turf? That takes guts, even with the guitar help. You clearly had lots of ideas about how to integrate these two themes! Lots of clever blending. It does have a few awkward moments, though: At 0:36, the arrangement begs to repeat the phrase a second time, but instead moves on. Same thing at 2:24. 1:12 is a little strange, structurally--it starts the transition with rising notes and then drops low instead of the high climax it leads the listener to anticipate. Some of the blends get a little too busy in the highs, e.g. 2:18-2:47, which is so cluttered the cymbals turn to mush. Overall, though, really great job, and I hope you spend some more time on this and send it in to the site.
The Wanderer: Well, it's a good start. Reminds me a lot of Phonetic Hero's Tengu Man remixes from the last compo, which I liked a lot. Too bad you never got a chance to finish.
Boulders Wreck Rapiers: Nice soundscape, but those leads aren't strong enough to cut through it all. Interesting coincidence how the opening hooks of both themes were so similar to begin with, and you really took advantage of that, although at the expense of the rest of the sources. The last section, where it becomes more melodic, doesn't fit very well with the rest of the arrangement or with the backing, and the transitions are a little awkward, especially with the wild portamento. Still, lots of good stuff here.
Age & Alchemist: Very thin soundscape, lacking in both low and high end and cluttered in the mids. More importantly, this is basically a medley until 2:25, with Plague Knight followed by Saturn. Nice effort to try to make the two play together at the end, however briefly, but there are a lot of clashing notes there. I like where this was going, but it needed a lot of adjustments to work.