This is the fourth level of the Low-power Tunnel of Run 3.
In this level, actually you don't need to jump. There are power tiles between all platforms, so what you need to do is walk, run or skate.
Use the Skater if you want to pass the level in a fast manner.
Side Tunnel Edit
You can now reach to the Memory Evaluation tunnel after beating this level! But you have to pass the Bridge Building minigame first, which is a pity.
But never mind, this Gentleman-exclusive tunnel is seven levels long, there are also gates that separates each level, which is very different aside of other tunnels. The gates are each three tiles long and circle the width of the tunnel, and there is one unlit tile in the center of each side of the gate. After the initial gate, there is a series of platforms arranged in a specific pattern, then another identical gate. Following the second gate there is another set of platforms in the same pattern, however, they are mostly or all unlit, requiring the player to somewhat memorize the pattern from before.
What a special side tunnel, isn't it?