Thanks for checking the game out! The blue filter is used to indicate that the player has gone into time-dilation mode. When the blue filter is active, you have the ability to move around freely at normal speed, while time for the rest of the world is slowed down. Picking up and throwing objects when this mode is activated greatly increases the force of your throws. It's similar to how the superhero Quicksilver was portrayed in the 2014 and 2016 X-Men films. If you have any more questions, please do not hesitate to let us know.