I LOVE the challenge portal concept added into Starbound except there is one that hasn't seemed to work for me! The challenge portal in which you have to swim through water with sawblades seems bugged. I got through the first par just fine but when i went down through the second pillar of water and opened the door the water began to drain into the next room but instead of filling up high enough let me get to the next part it stopped just above my characters head. Now I do have mods installed...
Challenge Portal bug
Challenge Portal bug