I am not quite sure what you mean by “fancy HUDs”. The following is a little explanation to the customisations in case you mean those. Otherwise please provide a screenshot and I will answer you as fast as possible.
With the last updates we got a lot of customisations. Those include different colors, hats and avatars.
Every player has an avatar. If you look at the names in the queue there are sometimes people with a spiral or a panda or a crown besides their name. Others just have the first letter of their user name.
Some players have special colors like rainbow or rasta. The color also changes the shape of the ship.
During a game the leader has a specific hat, which can be a crown or a fist or sum others.
All these can be found in the battle pass on the top right of the screen. Once you earned a feature it is yours and you can equip it.