If there was one game I wish I could experience again, it was Super Metroid. This hack absolutely captured the experience of the original for me. I had a blast exploring with so few items and then finding all the little hidden spots and entrances that are not obvious, but not impossible to find. I thought nothing would top Ascent for me, but this easily overtakes it.
I also found a cool Easter Egg that I posted about in the forum, but it is a massive spoiler, so I will not mention it here.