I'd call this Version 0.3

Assets/Components/BlackHole.cs

@@ -6,6 +6,8 @@ using UnityEngine;
 [RequireComponent(typeof(Collider2D))]
 public class BlackHole : MonoBehaviour
 {
+    protected float spentMass;
+
     public float Mass {
         get {
             return rigidbody.mass;
@@ -16,6 +18,15 @@ public class BlackHole : MonoBehaviour
         }
     }
 
+    public float UnspentMass {
+        get {
+            return rigidbody.mass - spentMass;
+        }
+        set {
+            spentMass = rigidbody.mass - value;
+        }
+    }
+
     public float Scale {
         get {
             return transform.localScale.x;
@@ -33,6 +44,7 @@ public class BlackHole : MonoBehaviour
 
     protected void Start() {
         Mass = 50;
+        spentMass = 0;
     }
 
     protected void OnTriggerEnter2D(Collider2D other) {

Assets/Components/Disappear.cs

@@ -20,7 +20,7 @@ public class Disappear : MonoBehaviour
     }
 
     protected void Update() {
-        health -= Mathf.Pow(5, particle.gameController.maxTierPresent - particle.Tier - 4) * Time.deltaTime;
+        health -= Mathf.Pow(particle.gameController.particleDurationConstant, particle.gameController.maxTierPresent - particle.Tier - 4) * Time.deltaTime;
 
         if(health < 0) {
             Destroy(this.gameObject);

Assets/Components/GameController.cs

@@ -9,11 +9,11 @@ public class GameController : MonoBehaviour
     public float gravitationConstant = 2;
     public int particlesToMerge = 5;
     public int scaleMultiplier = 3;
-    public int particleDurationPerTier = 5;
+    public int particleDurationConstant = 5;
 
-    [Header("Big Bang")]
+    [Header("Black Hole")]
-    public int bigBangParticles;
     public GameObject blackHolePrefab;
+    public BlackHole blackHole;
 
     [Header("Particles")]
     public GameObject particlePrefab;
@@ -25,17 +25,51 @@ public class GameController : MonoBehaviour
     [Header("Upgrades")]
     public float[] upgradePushForce;
     public float[] upgradePushRadius;
-    public float[] upgradeParticleCount;
+    public int[] upgradeParticleCount;
+    public int[] upgradeParticleTiers;
 
     [Header("Bought Upgrades")]
-    public int levelPush = 0;
+    public int _levelAntig = 0;
-    public int levelClick = 0;
+    public int _levelMatter = 0;
+    public int _levelFission = 0;
+
+    public int LevelAntig {
+        get {
+            return _levelAntig;
+        }
+        set {
+            _levelAntig = value;
+            pusher.pushForce = upgradePushForce[_levelAntig];
+            pusher.pushRadius = upgradePushRadius[_levelAntig];
+        }
+    }
+
+    public int LevelMatter {
+        get {
+            return _levelMatter;
+        }
+        set {
+            _levelMatter = value;
+            spawner.spawnedTier = upgradeParticleTiers[_levelMatter];
+        }
+    }
+
+    public int LevelFission {
+        get {
+            return _levelFission;
+        }
+        set {
+            _levelFission = value;
+            spawner.spawnCount = upgradeParticleCount[_levelFission];
+        }
+    }
 
     [Header("References")]
     public SpawnOnMouseClick spawner;
     public PushOnMouseClick pusher;
     public CameraPan panner;
     public MusicManager musicManager;
+    public Canvas canvas;
 
     protected void Awake() {
         spawner = Camera.main.GetComponent<SpawnOnMouseClick>();
@@ -43,10 +77,15 @@ public class GameController : MonoBehaviour
         panner = Camera.main.GetComponent<CameraPan>();
         musicManager = GetComponent<MusicManager>();
         simulatedObjects = new List<Gravitation>();
+        blackHole = GameObject.FindGameObjectWithTag("BlackHole").GetComponent<BlackHole>();
+        canvas = GameObject.FindGameObjectWithTag("Canvas").GetComponent<Canvas>();
     }
 
     protected void Start() {
         maxTierPresent = -1;
+        LevelAntig = 0;
+        LevelFission = 0;
+        LevelMatter = 0;
     }
 
     public void CheckNewMaxTier(int tier) {

Assets/Components/Particle.cs

@@ -49,12 +49,6 @@ public class Particle : MonoBehaviour {
         }
     }
 
-    public float Duration {
-        get {
-            return gameController.particleDurationPerTier * (Tier + 1);
-        }
-    }
-
     public GameObject ParticlePrefab {
         get {
             return gameController.particlePrefab;

Assets/Components/TextFromBlackHoleMass.cs

@@ -11,6 +11,7 @@ public class TextFromBlackHoleMass : MonoBehaviour
 
     protected void Awake() {
         text = GetComponent<Text>();
+        blackHole = GameObject.FindGameObjectWithTag("BlackHole").GetComponent<BlackHole>();
     }
 
     protected void Update()

Assets/Components/TextFromCost.cs

@@ -0,0 +1,22 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+
+public class TextFromCost : MonoBehaviour
+{
+    protected Text text;
+
+    protected void Awake() {
+        text = GetComponent<Text>();
+    }
+
+    public void DisplayCost(float cost) {
+        if(cost > 0) {
+            text.text = cost.ToString("0");
+        }
+        else {
+            text.text = "";
+        }
+    }
+}

Assets/Components/TextFromCost.cs.meta

@@ -0,0 +1,11 @@
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+guid: 432e89ec84c8b9440ab49c5b48484993
+MonoImporter:
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+  defaultReferences: []
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Assets/Components/TextFromUnspentBlackHoleMass.cs

@@ -0,0 +1,21 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+
+
+public class TextFromUnspentBlackHoleMass : MonoBehaviour
+{
+    protected Text text;
+    public BlackHole blackHole;
+
+    protected void Awake() {
+        text = GetComponent<Text>();
+        blackHole = GameObject.FindGameObjectWithTag("BlackHole").GetComponent<BlackHole>();
+    }
+
+    protected void Update()
+    {
+        text.text = blackHole.UnspentMass.ToString("0");
+    }
+}

Assets/Components/TextFromUnspentBlackHoleMass.cs.meta

@@ -0,0 +1,11 @@
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Assets/Components/UpgradeButton.cs

@@ -0,0 +1,92 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+using UnityEngine.EventSystems;
+
+[Serializable]
+public enum UpgradeType {
+    ANTIG, MATTER, FISSION
+}
+
+public class UpgradeButton : MonoBehaviour 
+{
+    public int cost;
+    public int level;
+    public UpgradeType type;
+
+    public Sprite cantBuySprite;
+    public Sprite canBuySprite;
+    public Sprite hoveredSprite;
+    public Sprite boughtSprite;
+
+    protected bool CanBeBought {
+        get {
+            return gameController.blackHole.UnspentMass >= cost;
+        }
+    }
+
+    protected bool HasBeenBought {
+        get {
+            switch(type) {
+                case UpgradeType.ANTIG: return gameController.LevelAntig >= level;
+                case UpgradeType.MATTER: return gameController.LevelMatter >= level;
+                case UpgradeType.FISSION: return gameController.LevelFission >= level;
+            }
+            //ok c#
+            return false;
+        }
+    }
+
+    protected GameController gameController;
+    protected Image image;
+
+    protected void Awake() {
+        gameController = GameObject.Find("GameController").GetComponent<GameController>();
+        image = GetComponent<Image>();
+    }
+
+    protected void Start() {
+        RefreshUpgrades();
+    }
+
+    public void OnPointerEnter() {
+        if(!HasBeenBought && CanBeBought) {
+            image.sprite = hoveredSprite;
+            gameController.canvas.BroadcastMessage("DisplayCost", cost);
+        }
+    }
+
+    public void OnPointerExit() {
+        if(!HasBeenBought && CanBeBought) {
+            image.sprite = canBuySprite;
+            gameController.canvas.BroadcastMessage("DisplayCost", -1f);
+        }
+    }
+    
+    public void OnPointerClick() {
+        if(!HasBeenBought && CanBeBought) {
+            gameController.blackHole.UnspentMass -= cost;
+            switch(type) {
+                case UpgradeType.ANTIG: gameController.LevelAntig = level; break;
+                case UpgradeType.MATTER: gameController.LevelMatter = level; break;
+                case UpgradeType.FISSION: gameController.LevelFission = level; break;
+            }
+            gameController.canvas.BroadcastMessage("RefreshUpgrades");
+        }
+    }
+
+    public void RefreshUpgrades() {
+        if(HasBeenBought) {
+            image.sprite = boughtSprite;
+        }
+        else if(CanBeBought) {
+            image.sprite = canBuySprite;
+        }
+        else {
+            image.sprite = cantBuySprite;
+        }
+    }
+    
+}

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Assets/Prefabs/GameController.prefab

@@ -302,9 +302,9 @@ MonoBehaviour:
   gravitationConstant: 2
   particlesToMerge: 5
   scaleMultiplier: 3
-  particleDurationPerTier: 15
+  particleDurationConstant: 5
-  bigBangParticles: 150
   blackHolePrefab: {fileID: 0}
+  blackHole: {fileID: 0}
   particlePrefab: {fileID: 5473375028011702754, guid: e73d8e05bd7498c4a80a63094f4594a8,
     type: 3}
   tierGradients:
@@ -485,15 +485,30 @@ MonoBehaviour:
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   simulatedObjects: []
   maxTierPresent: 0
-  upgradePushForce: []
+  upgradePushForce:
-  upgradePushRadius: []
+  - 0
-  upgradeParticleCount: []
+  - 100
-  levelPush: 0
+  - 1000
-  levelClick: 0
+  - 10000
+  - 100000
+  - 1000000
+  upgradePushRadius:
+  - 0
+  - 1
+  - 10
+  - 100
+  - 1000
+  - 10000
+  upgradeParticleCount: 010000000200000003000000040000000500000006000000
+  upgradeParticleTiers: 000000000100000002000000030000000400000005000000
+  _levelAntig: 0
+  _levelMatter: 0
+  _levelFission: 0
   spawner: {fileID: 0}
   pusher: {fileID: 0}
   panner: {fileID: 0}
   musicManager: {fileID: 0}
+  canvas: {fileID: 0}
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ProjectSettings/ProjectSettings.asset

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ProjectSettings/TagManager.asset

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