Looks pretty amazing and cool, good work!
A few things:
- The beginning (around 0:16) is a little dark, I think.
- The collectable green-black-grey things look a little weird IMO, I think I'd add some transparent and subtle but relatively bright greenish glow.
- The explosion on bigger enemies (see 1:09) is too lackluster, there should definitely be some chunks and sparks flying away and black smoke.
- Same goes for the green blobs, they should explode into small blobs (which then not fade out by alpha but by size).
- Your indieDB-link gives me a page not found error.

It looks like a lot of work already went into the project, I'm interested to see how it will turn out!