diff --git a/Main.cs b/Main.cs
index 28f86c0..6e0f59e 100644
--- a/Main.cs
+++ b/Main.cs
@@ -16,7 +16,7 @@ public class Main : Node2D
         GD.Randomize();
         _particleSimulation = new ParticleSimulation
         {
-            ScreenSize = GetViewportRect().Size
+            ScreenSize = GetViewportRect().Size * 1.25f
         };
         _particleSimulation.Initialize();
         foreach (var id in _particleSimulation.LastParticlesAdded)
diff --git a/Main.tscn b/Main.tscn
index 4017b61..03f04d6 100644
--- a/Main.tscn
+++ b/Main.tscn
@@ -6,3 +6,8 @@
 script = ExtResource( 1 )
 
 [node name="ParticlesNodes" type="Node2D" parent="."]
+
+[node name="Camera2D" type="Camera2D" parent="."]
+anchor_mode = 0
+current = true
+zoom = Vector2( 1.25, 1.25 )
diff --git a/ParticleNode.tscn b/ParticleNode.tscn
index c5ad203..eb89554 100644
--- a/ParticleNode.tscn
+++ b/ParticleNode.tscn
@@ -7,7 +7,7 @@
 script = ExtResource( 1 )
 
 [node name="Sprite" type="Sprite" parent="."]
-scale = Vector2( 0.2, 0.2 )
+scale = Vector2( 0.25, 0.25 )
 texture = ExtResource( 2 )
 
 [node name="Label" type="Label" parent="."]
diff --git a/ParticleSimulation/ParticleSimulation.cs b/ParticleSimulation/ParticleSimulation.cs
index 4472f4d..f9fce4d 100644
--- a/ParticleSimulation/ParticleSimulation.cs
+++ b/ParticleSimulation/ParticleSimulation.cs
@@ -24,10 +24,10 @@ namespace Particles
         
         private const int MaxParticles = 1000;
         private const int MaxParticleTypes = 10;
-        private const float HealthDelta = 0.002f;
-        private const float NegativeHealthMultiplier = 1.5f;
+        private const float HealthDelta = 0.0085f;
+        private const float NegativeHealthMultiplier = 0.25f;
 
-        private const float ParticleCollisionRadius = 13f;
+        private const float ParticleCollisionRadius = 20f;
         private const float ParticleCollisionStrength = 2.5f;
         private const float ParticleCollisionResponse = 2f;
 
@@ -62,9 +62,9 @@ namespace Particles
                 }
 
                 var position = particle.Position;
-                particle.Velocity = particle.Velocity.Clamped(4f);
+                particle.Velocity = particle.Velocity.Clamped(5f);
                 position += particle.Velocity;
-                particle.Velocity *= 0.875f;    // friction
+                particle.Velocity *= 0.855f;    // friction
                 if (position.x > ScreenSize.x)
                     position.x -= ScreenSize.x;
                 else if (position.x < 0)
@@ -74,12 +74,12 @@ namespace Particles
                 else if (position.y < 0)
                     position.y += ScreenSize.y;
                 particle.AddAverageSpeedValue(particle.Position.DistanceTo(position));
-                
-                if (particle.AverageSpeed < 0.15f)
+                /*
+                if (particle.AverageSpeed < 0.3f)
                     particle.Health -= HealthDelta * NegativeHealthMultiplier;
                 else
                     particle.Health += HealthDelta;
-
+                */
                 if (deletedParticle == false && particle.Health == 0f)
                 {
                     if (GD.Randf() < 0.2f)
@@ -89,10 +89,10 @@ namespace Particles
                         continue;
                     }
                 }
-
+                
                 particle.Position = position;
             }
-
+            
             foreach (var id in LastParticlesRemoved)
             {
                 _particles.Remove(id);
@@ -100,7 +100,8 @@ namespace Particles
             
             if (_particles.Count < MaxParticles)
             {
-                if (GD.Randf() < 0.3f)
+                var value = 2f * (1f / (_particles.Count / (float)MaxParticles));
+                if (GD.Randf() < (0.3f * value))
                 {
                     CreateRandomParticle();
                 }
@@ -127,8 +128,8 @@ namespace Particles
             foreach (var type1 in _particleTypes)
                 foreach(var type2 in _particleTypes)
                     type1.AddRelationship(type2,
-                        new ParticleRelationshipProps(ParticleCollisionRadius, (float)GD.RandRange(22, 50),
-                            (float)GD.RandRange(-0.3, 0.3)));
+                        new ParticleRelationshipProps(ParticleCollisionRadius, (float)GD.RandRange(25, 55),
+                            (float)GD.RandRange(-0.6, 0.7)));
         }
 
         private void CreateRandomParticle()
@@ -190,11 +191,11 @@ namespace Particles
                     continue;
                 var position = GetScreenWrapPosition(particle1.Position, particle2.Position);
                 var distanceSquared = particle1.Position.DistanceSquaredTo(position);
-                if (distanceSquared > (50f * 50f))
+                if (distanceSquared > (55f * 55f))
                     continue;
                 var direction = particle1.Position.DirectionTo(position);
 
-                if (distanceSquared < (50f * 50f))
+                if (distanceSquared < (40f * 40f))
                     closeCount++;
                 
                 // collision force
@@ -202,12 +203,21 @@ namespace Particles
                 if (distanceSquared < (ParticleCollisionRadius * ParticleCollisionRadius))
                 {
                     distance = particle1.Position.DistanceTo(position);
-                    var collisionForce = 1f / ((1f / ParticleCollisionStrength) + Mathf.Pow(Mathf.E, -ParticleCollisionResponse * (distance - ParticleCollisionRadius + 3f))) - 1f / (1f / ParticleCollisionStrength);
-                    //var collisionForce = 1f / (0.6f + Mathf.Pow(Mathf.E, -(distance - ParticleCollisionRadius - 2f))) - 1f / 0.6f;
+                    var collisionForce = 1f / (0.6f + Mathf.Pow(Mathf.E, -(distance - 12f))) - 1f / 0.6f;
                     particle1.Velocity += direction * collisionForce;
                 }
                 
                 // particle relationship force
+                /*
+                var props = particle1.Type.GetRelationship(particle2.Type);
+                if (props.Force == 0f || !(distanceSquared >= props.MinRadius * props.MinRadius) || !(distanceSquared <= props.MaxRadius * props.MaxRadius))
+                    continue;
+                distance = particle1.Position.DistanceTo(position);
+                var slope = props.Force / ((props.MaxRadius - props.MinRadius) / 2f);
+                var particleForce = -slope * Mathf.Abs(distance - (props.MinRadius + props.MaxRadius) / 2f) +
+                                    props.Force;
+                particle1.Velocity += direction * particleForce;
+                */
                 var props = particle1.Type.GetRelationship(particle2.Type);
                 if (props.Force != 0f && distanceSquared >= props.MinRadius * props.MinRadius &&
                     distanceSquared <= props.MaxRadius * props.MaxRadius)
@@ -243,7 +253,7 @@ namespace Particles
                 }
             }
             
-            if (closeCount < 4 || closeCount > 33)
+            if (closeCount > 50)
                 particle1.Health -= HealthDelta * NegativeHealthMultiplier;
             else
                 particle1.Health += HealthDelta;