Thank you! Depends on what control you use; in the game you can either right click or press shift to activate it. Oftentimes keyboards have a maximum number of simultaneous inputs allowed, and therefore doing WASD + SHIFT sometimes doesnt work depending on your layout... originally it was only shift to boost but I changed it to be primarily right click (as per what Milo says) so the whole keyboard thing isnt a problem. A little insight into development I suppose :P