This will be a guide to help people learn the ropes when it comes to the Pixel Lobbies. I've met a lot of people who barely knew the ropes on this area of the game and I haven't seen a decent guide on this as of yet. So here we go.

Finding the right lobby is important, luckily the game gives you everything you need to know about these lobbies before you dive in. They tell you how many players are in the lobby, what your connection is like to that lobby, and even who's hosting it.
As seen to the right, the blue lobbies are ones hosted by Mane6 themselves, green lobbies are ones that are verified by Mane6, red ones are currently running a different version of the game than you, and white lobbies are just random ones hosted by peepos. If you want to host a Pixel Lobby of your own, you can go here[forums.themsfightinherds.com].

Once you've selected a lobby (or created your own paradise) there's a lot of fun things you can do in them, such as fight against real people, interact with fellow players, and even just goof around with your costume.
When you first start in a lobby, it'll drop you in any old place. You can see your commands to access the leaderboards, your wardrobe and even your lobby options in the upper right hand corner. These buttons will change depending on what you have your controls set to. Using the wardrobe you can change your hat as well as your accessory. If you scroll left or right you can even change your character model. You can also chat in game, through text, speech, and premade speech bubbles. For text chat it's as simple as clicking on the box at the bottom of your screen but for speech and the bubbles it's a little more complicated because those have their own buttons assigned to them.
If you don't know what your buttons are to do these things just follow these steps:
Open your menu by holding down your magic button (default a/x on an Xbox/PS4 controller, and f key on keyboards.) From this menu you can access your wardrobe, check the leaderboards, enter a training room, and leave the lobby. At the bottom of this menu it shows your salt but that's not that important right now. For now, enter a Training Room. Once you are in this training room, you need to pause your game and go down to button configuration. From here you can look at your controls and edit them.
These are the defaults for an Xbox controller (plus my personal macro) and the defaults for a keyboard.
The buttons you are looking for are Utility 1 and Utility 2. Utility 1 brings up the premade speech bubbles and Utility 2 activates your voice chat if you hold it down. Be aware though that while you are holding down Utility 2 you aren't able to hear other players or the game (or at least I can't, if anyone knows how to fix this please let me know, it's a little annoying.)
In order to interact with other players and objects in the world it's as simple as pressing your magic button. When interacting with players you have the option to challenge the player to a battle, request a training room with the player you've selected, or spectate this players next fight. You can also see your ping to that player and how stable your connection is.
This brings me to the leader board. You can access the leader board by pressing the button in the upper right of your screen or by going through your magic menu (I don't know what it's actually called okay.) You can see who else is in the game with you, view their score (which I have no idea what it actually means), check how many wins they have, see your connection to other players (the p2p score in line with their name), and see how much salt each player has.
As you can see, there's a lot of things you can do in these Pixel Lobbies, but lucky for you, we get to go even deeper.

Now we get to talk about my favorite part of this game, the Salt Mines. The Salt Mines are a secret (read, not so secret) area behind the waterfall on the right of the map.The castle you see up at the top is the entrance to the Salt Mines, and this is where your salt comes into play. You get salt through fighting other players and collecting the chests that randomly appear on the map. When one of these chests appear there's a 1 minute timer that begins counting where anyone can collect the chest. Once you interact with the chest, another 10 second timer begins, separate from the original 1minute timer. If any player also interacts with that chest in those 10 seconds then the two of you begin a duel for who gets the salt that's in that chest. When battling other players you get one salt for the fight, regardless of how many times the two of you rematch, so if you're grinding for salt, it's always better to exit the fight, and then challenge the player again. Once you have three salt, you're ready to enter the Salt Mines.
This is a typical view of the Salt Mines. In the upper left, you can see your character, health, and salt. In the upper right, you can see the difficulty that the Salt Mines are currently at, as well as how many enemies are left to defeat before the difficulty jumps to the next level. The purple creature chasing you is what's known as a Predator. These are CPU fights with a random enemy from the game. As the Mines raise in difficulty so do your opponents, and eventually you will begin fighting CPU's of the main six characters. As the difficulty in the Mine rises, so does the cost to enter the Mine. If you win, you gain salt that scales with the difficulty, and if you lose, then you're booted out of the Salt Mines and you lose 10 salt as a penalty. Be sure to chose a character that you are comfortable with in the Salt Mines so you don't suffer this penalty often. To change your character simply open up your wardrobe and move left or right, and this will change your currently selected fighter. Your health and salt will stay the same though no matter who you pick. Another note about these fights with Predators is that every fighter starts the fight with full super meters, meaning that you can pull off your super at the beginning of the fight in every fight you encounter in the Salt Mines.
In the salt mines you will come across chests. There are three types of chests, ones that cost nothing, ones that cost a low amount of salt (2,3,4, etc.), and ones that cost a high amount of salt (20, 40, 60, etc.). The ones that cost nothing give you free salt. The ones that cost a low amount of salt give you healing items that heal you for 25% of your health. It's never a good idea to open these while you are at full health because you are wasting health items that you might need later, or that another player may need. The ones that cost a high amount of salt give you cosmetics for your characters. In the event that you open a chest and you already own the cosmetic that is in the chest, you are reimbursed double what you paid. So if you paid 20 for a chest, you get 40 back. These high cost chests also come with a timer though, and these work the same way they do in the rest of the lobby, in that if a player comes along and interacts with it then the two of you fight for who gets the item in the chest. If you lose, then you aren't reimbursed for the salt you spent on the chest. One positive note about fights between players is that neither of you suffer negative consequences for the fight, and you both exit the fight with the same amount of health you entered it with and neither of you is booted from the Mines. One more note about these chests is that when you open one, any Predators chasing you are banished, and if the difficulty increases before all the chests are used, those chests that are left over are banished and new chests are spawned across the map.
One last note I have about fights in the Mines is something I can't actually recreate. One time I was fighting a Cobra and the both of us killed each other at the same time. I figured it would boot me out and let me on my way but it actually restarted the fight and both mine and my opponents health meters were full. I don't know if this was a connection issue or if it was a glitch, but I felt that I should mention it in case someone can recreate it and confirm this.

Now you're free to go into the world of the Pixel Lobbies. I hope this guide helped you figure out how they work just a little more, and I hope I'm not spreading around any false information. If anything I've written is wrong please let me know so I can correct it. I am actually a human being and I do make mistakes despite what the internet thinks of it's users.