Implemented research cost, tweaked some values.

Scripts/Gameplay/Crafting/Inventory.cs

@@ -5,7 +5,7 @@ public class Inventory
 {
     public List<Item> items = new List<Item>();
 
-    public int maxInventorySize = 16;
+    public int maxInventorySize = 10;
     public event EventHandler OnInventoryUpdate;
 
     public bool AddItem(Item item, int amount)

Scripts/Gameplay/Research/Research.cs

@@ -15,10 +15,9 @@ public class Research
     {
         if (!paidResources)
         {
-            foreach (Ingredient ingredient in data.Inputs)
-            {
-                GameData.inventory.RemoveItem(ingredient.Item, ingredient.Amount);
-            }
+            if (!CanStart()) return ResearchResult.FAILED;
+
+            PayResources();
             paidResources = true;
         }
 
@@ -31,6 +30,19 @@ public class Research
         return ResearchResult.RESEARCHING;
     }
 
+    public bool CanStart()
+    {
+        return GameData.inventory.CanCraft(data.Inputs, 1);
+    }
+
+    public void PayResources()
+    {
+        foreach (Ingredient ingredient in data.Inputs)
+        {
+            GameData.inventory.RemoveItem(ingredient.Item, ingredient.Amount);
+        }
+    }
+
     public void Complete()
     {
         if (state == ResearchState.RESEARCHED) return;

Scripts/Gameplay/Robots/Robot.cs

@@ -4,12 +4,12 @@ using Godot;
 
 public partial class Robot : Node3D
 {
-	private const float EnergyUsePerSecond = 0.2f;
-	private const float HeatGainPerSecond = 7.5f;
-	private const float ActiveHeatLossPerSecond = 18f;
-	private const float IdleHeatLossPerSecond = 9f;
+	private const float EnergyUsePerSecond = 0.12f;
+	private const float HeatGainPerSecond = 5f;
+	private const float ActiveHeatLossPerSecond = 22f;
+	private const float IdleHeatLossPerSecond = 12f;
 	private const float CooldownTarget = 35f;
-	private const float MaintenanceLossPerSecond = 0.04f;
+	private const float MaintenanceLossPerSecond = 0.025f;
 
 	private bool isExecuting = false;
 	private ProgramNode currentNode;

Scripts/Gameplay/Survival/SurvivalState.cs

@@ -2,10 +2,10 @@ using System;
 
 public class SurvivalState
 {
-    private const float HungerDrainPerSecond = 0.035f;
-    private const float ThirstDrainPerSecond = 0.055f;
-    private const float PassiveEnergyDrainPerSecond = 0.025f;
-    private const float AutoConsumeThreshold = 35f;
+    private const float HungerDrainPerSecond = 0.012f;
+    private const float ThirstDrainPerSecond = 0.018f;
+    private const float PassiveEnergyDrainPerSecond = 0.01f;
+    private const float AutoConsumeThreshold = 30f;
 
     public float hunger = 100f;
     public float thirst = 100f;
@@ -48,7 +48,7 @@ public class SurvivalState
         if (hunger > AutoConsumeThreshold) return;
         if (!GameData.inventory.TryRemoveItem("mushroom", 1)) return;
 
-        hunger = Math.Clamp(hunger + 35f, 0f, maxHunger);
+        hunger = Math.Clamp(hunger + 45f, 0f, maxHunger);
     }
 
     private void TryAutoConsumeWater()
@@ -56,7 +56,7 @@ public class SurvivalState
         if (thirst > AutoConsumeThreshold) return;
         if (!GameData.inventory.TryRemoveItem("water", 1)) return;
 
-        thirst = Math.Clamp(thirst + 40f, 0f, maxThirst);
+        thirst = Math.Clamp(thirst + 50f, 0f, maxThirst);
     }
 
     private void TryAutoConsumeEnergy()
@@ -65,19 +65,19 @@ public class SurvivalState
 
         if (GameData.inventory.TryRemoveItem("battery_v2", 1))
         {
-            energy = Math.Clamp(energy + 70f, 0f, maxEnergy);
+            energy = Math.Clamp(energy + 90f, 0f, maxEnergy);
             return;
         }
 
         if (GameData.inventory.TryRemoveItem("battery_v1", 1))
         {
-            energy = Math.Clamp(energy + 45f, 0f, maxEnergy);
+            energy = Math.Clamp(energy + 65f, 0f, maxEnergy);
             return;
         }
 
         if (GameData.inventory.TryRemoveItem("steam", 1))
         {
-            energy = Math.Clamp(energy + 25f, 0f, maxEnergy);
+            energy = Math.Clamp(energy + 40f, 0f, maxEnergy);
         }
     }