Played this map with 2 friends yesterday and enjoyed it, although we couldn't finish it due to a bug.
First bug we noticed was with the iceberg jumping. It's common to get stuck in the moving ice briefly, which will stop the ice temporarily, usually gibbing the player afterwards. When this happens, the ice chunks respawn much closer together, making the jumping puzzle extremely hard if not impossible. This is solved by restarting the map since it's right at the start.
Next bug that broke the whole map for us was in the room (after the ice spike jumping puzzle) where you have to move the object onto the elevator, and then along the platform (the room where you have a view of the ship and the text on it). We had one failed attempt of getting it down the platform, so we tossed it off and sent it back up the elevator again. Once we tried to send it back up the elevator, it was completely stuck and couldn't move. This prevented us from completing the map, and I'm not sure how close that section is to the end