Helix Jump is a time killer you seek for. Just bounce the ball down the spiral tunnel! Spin the staircase to fall to another floor and leap over dangerous red blocks. Each time the staircase ends, you get to another one, preserving your previous score.
This one might be simple in the beginning, but you get confused with each new level. Look for green boosters at platforms, which can bring you a dozen floors down through all kinds of blocks.
Try different modes, including the popular one with a rainbow ladder. Get as many scores as possible!