it is done

core/src/mindustry/ui/dialogs/ControlsDialog.java

@@ -0,0 +1,27 @@
+package mindustry.ui.dialogs;
+
+import arc.input.*;
+import arc.scene.ui.*;
+import arc.util.*;
+import mindustry.gen.*;
+import mindustry.graphics.*;
+
+public class ControlsDialog extends KeybindDialog{
+
+    public ControlsDialog(){
+        setFillParent(true);
+        title.setAlignment(Align.center);
+        titleTable.row();
+        titleTable.add(new Image()).growX().height(3f).pad(4f).get().setColor(Pal.accent);
+    }
+
+    @Override
+    public void addCloseButton(){
+        buttons.addImageTextButton("$back", Icon.arrowLeftSmall, this::hide).size(230f, 64f);
+
+        keyDown(key -> {
+            if(key == KeyCode.ESCAPE || key == KeyCode.BACK)
+                hide();
+        });
+    }
+}