Thanks, I'm glad you like it. To be honest I like this simple graphics style, it's very intentional and I'm quit happy with it :)
As for the theme - I thought that use of theme is so obvious it doesn't need explanation. You are trapped in a gravity field of the black hole - you have passed the point of no return and you will be killed or crushed by the blackhole. Anyway thanks for info, I added it to the description (yeah, nobody reads it, I know :D )