new boost smoke FX

new explosion FX

fixed behaviour around ceiling

pixel landing on top of a pixel hovering on ceiling => game over

crashing into ceiling with low velocity only lighlty bounces the pixel back down

game now fills the entire screen, landscape or portrait

pixels now have momentum - pixel landing on top of another pixel will push the column down a bit, depending on how many pixels there are in a column already

UI cleanup

Space, click or tap to play - instruction text is simplified to Tap to play, if touch screen is detected

more dynamic scoring - only after a pixel is landed, score is increased, so a column is not scored in full until it is fully landed

now it is also possible to land a pixel on a landing column and score 2x more points, not just 1 point more

pixels still descending while landing explode if a pixel crashes on top of the column - no points!

game does not end until all pixels either land or explode

Added best score display