A guide to getting all the achievements for the game.
Go to the “Space: VOID” level. Stay in the middle lane. Press the up arrow key whenever a car approaches. Die once you get the green star achievement.
Go to the Christmas level (click MORE at the bottom right of level select to get to it). Stay in the middle lane. Press the up arrow key whenever a car approaches (you can still do this when there are two in a row, just jump later). Die once you get the blue star achievement. Be careful not to jump over it.
Go to “The Old City” level. Get in the middle lane (between the two roads). Press Alt+Tab. Wait.