Added missed files, updated uCore

core/src/io/anuke/mindustry/entities/enemies/TargetEnemy.java

@@ -0,0 +1,50 @@
+package io.anuke.mindustry.entities.enemies;
+
+import com.badlogic.gdx.graphics.Color;
+
+import io.anuke.mindustry.Vars;
+import io.anuke.ucore.core.Draw;
+import io.anuke.ucore.core.Timers;
+
+public class TargetEnemy extends Enemy{
+	
+	public TargetEnemy(int spawn){
+		super(0);
+		speed = 0f;
+		maxhealth = 10;
+	}
+	
+	void move(){
+		
+	}
+	
+	void shoot(){
+		
+	}
+	
+	@Override
+	public void removed(){
+		//don't call enemy death since this is only a target
+	}
+	
+	@Override
+	public void draw(){
+		super.draw();
+		
+		Draw.color(Color.YELLOW);
+		
+		if(Vars.control.getTutorial().showTarget()){
+			Draw.spikes(x, y, 11f, 4f, 8, Timers.time());
+		}
+		
+		Draw.color();
+	}
+	
+	@Override
+	public void onDeath(){
+		super.onDeath();
+		Timers.run(100f, ()->{
+			new TargetEnemy(0).set(x, y).add();
+		});
+	}
+}