To touch the thorny rose, use the bottom rope passage and jump over the stop sign before the swing so you're coming down on the swing. That gives you the speed you need to reach the rose.
Tactical, beautiful, and wholly unique, the GOTY-winning sci-fi RTS returns with Homeworld 3. Assume control and battle through fleet combat in dazzling, fully 3D space while the award-winning story unfolds on a galactic scale.