Polished, began adding score, added warning to download.

Entities/DownloadEntity.cs

@@ -14,7 +14,7 @@ namespace SkinnerBox.Entities
         public TransitionValue progressValue;
         public RectangleMesh progressMesh;
         public TransitionValue timeElapsed;
-        public float health;
+        public float upTime;
         int size;
         public int Size {
             get {
@@ -30,7 +30,7 @@ namespace SkinnerBox.Entities
         public override RectangleF HitBox {
             get {
                 RectangleF rect = base.HitBox;
-                rect.Width = Width * size;
+                rect.Width = Width + 0.5f;
                 return rect;
             }
         }
@@ -53,15 +53,11 @@ namespace SkinnerBox.Entities
         public void Reset()
         {
             Size = 1;
-            X = 0;
-            Y = 0;
-            mesh.X = X;
-            mesh.Y = Y;
             progressValue.HardSet(0);
             timeElapsed.HardSet(0);
             stepSize = 0;
-            health = 0;
-            Color = Color.DarkCyan;
+            upTime = 0;
+            Color = Color.Cyan;
             UpdateProgressMesh();
         }
 
@@ -75,11 +71,13 @@ namespace SkinnerBox.Entities
         public override void InterpolatePosition(float delta) {
             progressValue.InterpolatePosition(delta);
             timeElapsed.InterpolatePosition(delta);
-            float prog = timeElapsed.Value / health;
+            float prog = timeElapsed.Value / upTime;
             if (prog > 1) prog = 1;
             if (prog < 0) prog = 0;
             this.Color = Color.FromArgb((int)(byte.MaxValue * (1f - prog)), Color);
+            progressMesh.Color = Color.FromArgb((int)(byte.MaxValue * (1f - prog)), progressMesh.Color);
             UpdateProgressMesh();
+            base.InterpolatePosition(delta);
         }
     }
 
@@ -87,7 +85,7 @@ namespace SkinnerBox.Entities
     {
         public float period;
         public float elapsedSinceSpawn;
-        public float health;
+        public float upTime;
         public float stepSize;
         public int maximumAmount;
         public int generalSize;
@@ -97,7 +95,7 @@ namespace SkinnerBox.Entities
         {
             this.period = cooldown;
             this.elapsedSinceSpawn = 0;
-            this.health = health;
+            this.upTime = health;
             this.stepSize = stepSize;
             this.maximumAmount = maxAmount;
             this.sizeRange = sizeRange;

Entities/ServerEntity.cs

@@ -7,6 +7,8 @@ namespace SkinnerBox.Entities
 {
     public class ServerEntity : Entity
     {
+        public const float MIN_SPEED = 1f;
+        public const float SPEED_STEP = 1f;
         private readonly float length = 4/8f;
         public float Speed { get; set; }
         public override float CenterX {
@@ -35,7 +37,7 @@ namespace SkinnerBox.Entities
         public override RectangleF HitBox {
             get {
                 RectangleF hitbox = base.HitBox;
-                hitbox.Width = hitbox.Width * size;
+                hitbox.Width = Width;
                 return hitbox;
             }
         }
@@ -46,7 +48,7 @@ namespace SkinnerBox.Entities
 
             Size = 1;
             
-            this.Speed = 2f;
+            this.Speed = MIN_SPEED;
 
             CenterX = initialX;
             mesh.X = X;

Entities/WarningEntity.cs

@@ -12,8 +12,8 @@ namespace SkinnerBox.Entities
         public TransitionValue aliveTime;
 
         public WarningEntity(ITexture texture) : base(texture) {
-            this.Width = 2;
-            this.Height = 2;
+            this.Width = 1f;
+            this.Height = 1f;
             Reset();
         }
         public void Reset()
@@ -21,7 +21,7 @@ namespace SkinnerBox.Entities
             LifeTime = 0;
             X = 0 - Width;
             mesh.X = X;
-            Y = Game.HEIGHT_UNITS - Height;
+            Y = - Height;
             mesh.Y = Y;
             aliveTime.HardSet(0);
             this.Color = Color.Red;