Throughout the levels are scattered large spheres and cylinders , which the player can roll when crushed appropriately . These can then be used as platforms or to depress switches . Jigsaw pieces can be collected to reveal concept art and extras in the game 's menus . Some of Danny 's " thoughts " , represented by glowing neon icons on the walls of the level , are only activated when the level is crushed in a manner that do not obscure them . Some thoughts allow Danny to jump higher or stop time . Once the player complete each level , they are graded by the duration of Danny 's stay on the level , how many times Danny " woke up " , and a bonus for collecting all marbles , the jigsaw piece , and a hidden thought trophy . The thought trophy , once completed by crushing , unlock a level 's special challenge mode for later play which require time @-@ limited completion of the level with an allotted number of crushes .