This is level 1 of the L-Tunnel.
When you use the Runner, use small jumps and go to the platform on the direct left of you. Don't skip platforms. If you jump too far, you might land in front of the strips. Also, don't use the one-tile "bridges."
As the Lizard, you should use high jumps and skip platforms. If there is a platform that is on the upper left side, jump on that one. Keep going until the end and then hover over the last platform, then land. It shouldn't be too hard.
Just make sure that your jump's length is well-calculated, so that your jump will not overshoot, which may lead to the failure of the level. Keep an eye on that!