imrpoved UI system structure and added a basic text module for testing; Untested.

RhythmBullet/Zer01HD/UI/Modular/Module.cs

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+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RhythmBullet.Zer01HD.UI.Modular
+{
+    public class Module
+    {
+        public Vector2 Position = new Vector2();
+        public float Width, Height;
+        public ModuleGroup Parent;
+        public string Name;
+        public Color Color;
+
+        public virtual void Update(GameTime gameTime)
+        {
+
+        }
+
+        public virtual void Draw(SpriteBatch batch)
+        {
+
+        }
+
+        public void RemoveFromParent()
+        {
+            if (Parent == null)
+            {
+                throw new InvalidOperationException("Parent is null.");
+            }
+            Parent.RemoveModule(this);
+        }
+    }
+}

RhythmBullet/Zer01HD/UI/Modular/ModuleGroup.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace RhythmBullet.Zer01HD.UI.Modular
+{
+    public class ModuleGroup : Module
+    {
+        List<Module> modules = new List<Module>();
+        Rectangle scissorBounds;
+        RasterizerState scissorRasterizer = new RasterizerState();
+        public ModuleGroup(bool crop = false)
+        {
+            if (crop)
+            {
+                scissorRasterizer.ScissorTestEnable = true;
+                scissorBounds = new Rectangle();
+            }
+        }
+
+        public override void Draw(SpriteBatch batch)
+        {
+            if (scissorBounds != null)
+            {
+                batch.End();
+                batch.Begin(SpriteSortMode.Deferred, null, null, null, scissorRasterizer);
+                scissorBounds.Width = (int) Width;
+                scissorBounds.Height = (int) Height;
+                scissorBounds.X = (int) Position.X;
+                scissorBounds.Y = (int) Position.Y;
+                Rectangle scissor = scissorBounds;
+                scissorBounds = batch.GraphicsDevice.ScissorRectangle;
+                batch.GraphicsDevice.ScissorRectangle = scissor;
+            }
+            foreach (Module module in modules)
+            {
+                float offsetX = module.Position.X;
+                float offsetY = module.Position.Y;
+                module.Position.X = Position.X + offsetX;
+                module.Position.Y = Position.Y + offsetY;
+                module.Draw(batch);
+                module.Position.X = offsetX;
+                module.Position.Y = offsetY;
+            }
+
+            if (scissorBounds != null)
+            {
+                batch.GraphicsDevice.ScissorRectangle = scissorBounds;
+                batch.End();
+                batch.Begin();
+            }
+        }
+
+        public override void Update(GameTime gameTime)
+        {
+            foreach (Module module in modules)
+            {
+                module.Update(gameTime);
+            }
+        }
+
+        public void AddModule(params Module[] addModules)
+        {
+            foreach (Module module in addModules)
+            {
+                if (modules.Contains(module))
+                {
+                    throw new InvalidOperationException(module.ToString() + " already exists in " + this.ToString());
+                }
+                module.Parent = this;
+                modules.Add(module);
+            }
+        }
+
+        public void RemoveModule(Module module)
+        {
+            module.Parent = null;
+            modules.Remove(module);
+        }
+    }
+}

RhythmBullet/Zer01HD/UI/Modular/Text.cs

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+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RhythmBullet.Zer01HD.UI.Modular
+{
+    class Text : Module
+    {
+        private SpriteFont font;
+        private float scale;
+        public string DisplayedText
+        {
+            get
+            {
+                return DisplayedText;
+            }
+            set
+            {
+                Vector2 size = font.MeasureString(value);
+                Width = size.X;
+                scale = Height / size.Y;
+            }
+        }
+        public Text(string displayedText, SpriteFont font, int height)
+        {
+            this.font = font;
+            Height = height;
+        }
+
+        public override void Draw(SpriteBatch batch)
+        {
+            batch.DrawString(font, DisplayedText, Position, Color);
+            base.Draw(batch);
+        }
+    }
+}