Adds a partially usable arena menu openable through a command

src/main/java/net/knarcraft/minigames/gui/DropperGUI.java

@@ -0,0 +1,19 @@
+package net.knarcraft.minigames.gui;
+
+/**
+ * A GUI used in the dropper arena
+ */
+public class DropperGUI extends ArenaGUI {
+
+    /**
+     * Instantiates a new dropper gui
+     */
+    public DropperGUI() {
+        super(9, "Dropper");
+        setItem(0, getTogglePlayersItem());
+        setItem(2, getLeaveItem());
+
+        setAnyClickAction(2, getLeaveAction());
+    }
+
+}