For a begginers eyecandy attempt this is great, there were some real gems in there! The hades gate, citadel,camp and graveyard where all awesome! The road was just hillarious, brilliant. Although the temple of the gods poking out of the citadel looked a bit dodgy.
The maps where you greatly enlarged things (the giants and the palace) where not very good,don't enlarge things unless you really, really need to.
What you realy need to work on is terrain, this is where your maps fall apart. While the ideas are great terrain makes a HUGE difference to mood. Blocks of 1 terrain type always look bad.