I was looking and couldn't find a dedicated discord for this game, like for most games there's a button on the side that says discord, you click it and it sends you to that games discord. If it exists could you link it to the speedrun.com page and if it doesn't could someone make it please.

I'm not aware of a Metrocubevania specific discord but there is a general Pico-8 speedrunning server if you're interested https://discord.gg/teQmPPxFdt