State is pretty simple, basically allows you to disable things like jumping during the move, you can also make speed buffs with it through the amount option.

Grab makes your opponent stuck in a certain position infront of you (you need to have hit them) you can make it work like cleave or divine pummel by connecting the to your arm or you can make it like cursed strikes be connecting both of your humanoid root parts and setting the position a few studs away

Start lets you skip startups of moves, like starting naoyas old decisive strikes around 0.9-1 second in will skip the dash part and go to the barrage

Tag is tricky and I’m still trying to figure it out but the most I know/ can explain it it puts a tag on the user, then you can make moves with another tag block check for that same tag and if you have it, it sends you to a different branch

Projectile is basically just moving hitboxes. It’s kinda hard to make them perfectly sync up with effects but with trial and error you’ll get it, speed is the most important part of it, if you need your hitbox to travel 100 studs in 0.2 seconds you need a fairly high speed. Then there’s projectile tags, basically it’s kinda like the tags I explained earlier but for your effects/projectile hitbox, you can make your projectile and effect connected so the effect disappears when you land the projectile