I really loved it! ^^ Was fun to figure out your own kind of strategy of who to place where and what mode of transportation to use. Got a bit hectic in the later levels of course, but I think it adds to the experience of a true Amazon delivery driver, lol. XD
I'm also sooooo impressed (and also a little jealous ^^') of how polished the game is, despite you having worked on this alone. :o Loved the art, the characters, the lil icons and names for them, the world, the minimaps, the big map when you scroll out. This game is PACKED with features!
One thing I would have to critique tho is the music. While some people liked it, I unfortunately think it sounds a bit unfinished... which makes sense since you said it was the last thing you worked on. ^^' Also the characters kept getting stuck on buildings here and there. Especially in the city of East Island.
Other than that... man, you really made a gem here. <3