Very good game
Requiring skill to link up chain, not having to start over after failing 5 times and I could play through it in 40 minutes, so it's not too easy and not really hard.
The text in between and the plot are very funny and good.
One major flaw (already pointed out below): in endless mode the indestructible black hole particles spawn and automatically pile up to game over. Either these should not be present, only lightly present and don't count as a particle or made destructable.