Use the block pieces you carry on your back to cross the obstacle platform in Stair Run Online. Use these pieces to make bridges, roads, and pass over obstacles. In Stair Run Online Unblocked game, you have to use the block pieces carefully. You will always need these parts until you reach the end of the level. While moving on the platform, take the spare blocks on the ground and go to the grand staircase at the end of the game. In Stair Run Online game, you have to climb to the top of this ladder with the remaining blocks at the end of the level. Have fun.