Made gui and added first item.

src/main/java/me/fivevl/troll/Main.kt

@@ -1,9 +1,12 @@
 package me.fivevl.troll
 
+import me.fivevl.troll.commands.TrollCommand
 import org.bukkit.plugin.java.JavaPlugin
 
 class Main : JavaPlugin() {
     override fun onEnable() {
-
+        Utils.instance = this
+        getCommand("troll")!!.setExecutor(TrollCommand())
+        logger.info("Troll plugin enabled successfully!")
     }
 }

src/main/java/me/fivevl/troll/Utils.kt

@@ -0,0 +1,18 @@
+package me.fivevl.troll
+
+import net.kyori.adventure.text.Component
+import net.kyori.adventure.text.minimessage.MiniMessage
+
+object Utils {
+    lateinit var instance: Main
+    fun color(s: String): Component {
+        return MiniMessage.miniMessage().deserialize(s)
+    }
+    fun loreBuilder(vararg arr: String): ArrayList<Component> {
+        val lore = ArrayList<Component>()
+        for (s in arr) {
+            lore.add(color("<color:#40fff9>$s</color>"))
+        }
+        return lore
+    }
+}

src/main/java/me/fivevl/troll/commands/TrollCommand.kt

@@ -0,0 +1,30 @@
+package me.fivevl.troll.commands
+
+import me.fivevl.troll.Utils
+import me.fivevl.troll.gui.TrollGui
+import org.bukkit.Bukkit
+import org.bukkit.command.Command
+import org.bukkit.command.CommandExecutor
+import org.bukkit.command.CommandSender
+import org.bukkit.entity.Player
+
+class TrollCommand : CommandExecutor {
+    override fun onCommand(sender: CommandSender, command: Command, label: String, args: Array<out String>?): Boolean {
+        if (sender !is Player) {
+            sender.sendMessage(Utils.color("<red>You must be a player to use this command!</red>"))
+            return true
+        }
+        val p = sender.player!!
+        if (args == null || args.size != 1) {
+            p.sendMessage(Utils.color("<red>Usage: /troll <player></red>"))
+            return true
+        }
+        val target = Bukkit.getPlayer(args[0])
+        if (target == null) {
+            p.sendMessage(Utils.color("<red>Player not found!</red>"))
+            return true
+        }
+        p.openInventory(TrollGui.getGui(target))
+        return true
+    }
+}

src/main/java/me/fivevl/troll/gui/TrollGui.kt

@@ -0,0 +1,25 @@
+package me.fivevl.troll.gui
+
+import me.fivevl.troll.Utils
+import org.bukkit.Bukkit
+import org.bukkit.Material
+import org.bukkit.entity.Player
+import org.bukkit.inventory.Inventory
+import org.bukkit.inventory.ItemStack
+
+object TrollGui {
+    fun getGui(target: Player): Inventory {
+        val gui = Bukkit.createInventory(null, 54, Utils.color("<color:#ff9e36>Troll Menu - ${target.name}</color>"))
+        gui.setItem(0, getYeetItem())
+        return gui
+    }
+
+    private fun getYeetItem(): ItemStack {
+        val item = ItemStack(Material.ELYTRA)
+        val meta = item.itemMeta
+        meta.displayName(Utils.color("<color:#ffd6cf>Yeet</color>"))
+        meta.lore(Utils.loreBuilder("This will yeet the player", "in a random direction."))
+        item.itemMeta = meta
+        return item
+    }
+}

src/main/resources/plugin.yml

@@ -4,3 +4,6 @@ main: me.fivevl.troll.Main
 api-version: 1.18
 authors: [ 5vl ]
 description: This is a cool troll plugin!
+commands:
+  troll:
+    description: Troll a player!