I like the black-hole effect! Found it a little irritating that stuff is coming out of it, but in theory there is Hawkin-radiation coming from the event horizon of black holes, so all is good :-)
The gameplay is fast-paced, and so is dying. The graphics are really good, also the audio. I only wish it would have been little easier to survive / make progress, dying quickly and constantly is not the best experience. But other than that - a solid entry!