Hulk SmashUp: use your left and right arrow keys to move along city block. Climb up and down the sides of buildings using the up and down arrow keys. To leap, use the control key and the direction key you want to move in... Use the space bar for punching and climbing and pounding and walking. Smash everything before the time runs out and the Hulk changes back into human alter ego. Dr Bruce Banner. As you destroy the level you will be able to move on to more challenging bashing levels, have fun!