So for those of you who haven't noticed, the game has a multiplayer mode! However, you may have also noticed it's local-only. Well no worries, Parsec to the rescue!
To be honest, this was my secret weapon while play-testing the game's multiplayer with my play-testers, and it worked pretty well in our experience. I didn't mention it sooner because... well, because honestly I wasn't sure how to best go about announcing it. But hey, better late than never, and now I'm here to tell you how to play the game's multiplayer online using Parsec! This isn't a detailed guide, so if anything isn't clear, there's plenty of places where you can find help online, or you can ask for clarification here and I'll try to do my best to help!
Step 1: Download Parsec at https://parsecgaming.com/
Step 2: Run the program and create your account, then get your friend, rival, frenemy, or bitter mortal enemy who you plan to play with to do the same.
Step 3: Send a friend request to the person you want to play with.
Step 4: If you wanna host, set your computer to be able to host in Parsec's settings. In the settings you can also (optionally) set which programs your friends/enemies/etc. can actually see.
Step 5: If you wanna join, find the friend (or "friend" if you're trying to settle an argument with a bitter enemy or something using the game, not judging) who you want to play with and press the button to request playing on their machine.
Step 6: Run the game.
Step 7: Make sure the host has enabled keyboard control in Parsec, or that the host has a gamepad-to-keyboard program set up!
Step 8: Remap the controls to each player's liking.
Step 9: Have fun!
I don't have experience using Parsec's party system, but from what I understand, if you want to host a match publicly which other people can join, you can use Parsec for that too! But that's beyond the scope of this guide, I just thought you might want to know.
Have fun!
~Adam