Low-Power Tunnel, part 3 is the third level of the Low-Power Tunnel. This again, is an extremely short level, with only 3600 pixels long.
This level is very easy. This is the solution: Jump and move right twice, and you should have completed the level.
You can see where the gaps are. They are seen where the stars appear. When you see an area without stars, that implies a platform is there, so you can safely jump on it.