Looks cool. I love the counter-culture style. If you used RPGMaker, you did a good job of diversifying the gameplay!
Seems like there is a LOT of content as far music and items, and mini-games... but $20 is too high. I'll bet the price feels right to you, after 3 years, and all that music and stuff, but $20 is when I start thinking about cost, as opposed to anything under $10... and I do talk myself out of buying stuff any chance I get.
Looks great though!