Ah the hill slope...I didn't even remember that SOM3 had so much influence on this. Now i feel so shamed for those pixels in this particular tile, i hate copying and tracing... Look for yourself, updated picture:|
Looks good. But you should mention your close references to Secret of Mana 3. Reminds me of this old old game my friend had on his 486, like a done up version with much better graphics, haha. Oh, perspective of the car doesn't match everything else, btw.
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... do you make it ? 
Keep up the good work