This looks really nice, I really like the spikes that come out of the islands that show the different team colours. For such a small addition they make a really bold impact for me without taking over the rest of the features of the map. I love the general theme and colour theme too. It feels almost eerie, that again is effected by the night sky though. The green almost glows looking like it's giving off radiation.
I think this map has a lot of potential, I wouldn't say it's completely finished but it's definitely got potential. I feel there is a lot of gaps and spaces between the islands that could do with filling in (maybe vertical pipes coming from below filled with the green waste to make islands, some parts of the pipes broken so the waste is being shot outwards from it?) and I feel the centre island could do with being slightly bigger.
Looking at this though makes me want to play around with these blocks and theme now :P I can't wait to see what you build next. I'll be keeping an eye out for your content.