Boost Rush Mode is a very different mode from Boost Mode. Levels are grouped into "packs" and then the player tries to get through them while the screen scrolls to the right, forcing the player onward. The goal is to grab as many coins as possible and go for a high score in the pack for bragging rights.
While this may seem simple, the screen's speed will adjust according to how many coins you get. The more coins you collect, the faster the screen will go. This will mean that you can put yourself in a position where it becomes more difficult for you to complete the level because you've collected too many coins. This will make it increasingly difficult to get the highest scores because it will require not just perfection but adjustment to the different screen speeds.
