 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 . <unk> 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 does not obscure them . Some thoughts allow Danny to jump higher or stop time . Once the player completes each level , they are graded by the duration of Danny 's stay on the level , how many times Danny " <unk> up " , and a bonus for collecting all marbles , the <unk> piece , and a hidden thought trophy . The thought trophy , once completed by crushing , unlocks a level 's special challenge mode for later play which requires time @-@ limited completion of the level with an allotted number of <unk> . 
