The Boosters Are bugged so don't use them. Also This game Is fragile so there might be a few bugs a can't fix at the moment. anyway Space key= place track, Drag mouse while holding space to create thrill extentions, and Up arrow to switch peices. MAKE SHURE TO USE LIFT HILL PEICE AT THE BEGINNING OR YOUR COASTER WILL NOT WORK!!!!!!
credit to @tunabagel For the motivation on my last rollercoaster project.