I like this...very "trippy" to say the least

. I have an itch with it though; Props for studying

, but you say you are trying to imitate the dither god, Monsoon2d's, dithering, yet you don't follow how he does it

.

He goes both ways with the dither, while you are only going out one direction (that's as best as I can explain it, sorry

). The result is dither-y, but not as effective as it could be.
But as for the piece itself, I like it. The way the butterflies melt into the sky is awesome. I'd suggest maybe some hue-shifting in the sky as you did with the sea, but that's personal preference I guess... Either way, keep pixelling!