According to Mat, Rush has been updated, as he said in the Nitrome Blog post on the 23rd of December. Rush now has a Highscore Table, which was not available before.
Race Mode has been tweaked, as to get rid of the awful cannot-switch-gravity-glitch, and Eliminator Mode has been fixed. I haven’t seen anything wrong with Eliminator Mode, so I don’t know what has been fixed.
Since it has been fixed, Race mode is a lot easier to complete, and I guess Eliminator Mode is easier to. So, want to get on the high scores? Go and play!