Hey, my name is ParryHotter.
Mainly I code some games in Unity, but I’ve created some Bukkit-Plugins, too.
Now, with Sponge, I’m going to concentrate more on Minecraft plugins and mods^^
I’m really looking forward to code with Sponge
and I’m trying to contribute the project everywhere i can.
See ya
I wish you good luck in the future! 
Welcome to the forums @ParryHotter!
A few links to get you started:
https://docs.spongepowered.org/
suddenly ideas of trying to mix a unity game with a minecraft game.
a game in two worlds, do things in minecraft to help the player in unity and vice-versa
something to think about? ;D
good luck to your sponge plugin development .ww.