diff --git a/world.gd b/world.gd
index 588d07f..5e5a16f 100644
--- a/world.gd
+++ b/world.gd
@@ -21,10 +21,9 @@ enum CellStates {
 
 @onready var generation_ui: MarginContainer = $UI/WorldGeneration
 @onready var generation_seed: LineEdit = $UI/WorldGeneration/VBoxContainer/Seed/Input
+@onready var generation_speed: HSlider = $UI/WorldGeneration/VBoxContainer/GenerationSpeed/Input
 @onready var generation_world_size_x: LineEdit = $UI/WorldGeneration/VBoxContainer/WorldSize/Input_x
 @onready var generation_world_size_y: LineEdit = $UI/WorldGeneration/VBoxContainer/WorldSize/Input_y
-@onready var generation_cell_size_x: LineEdit = $UI/WorldGeneration/VBoxContainer/CellSize/Input_x
-@onready var generation_cell_size_y: LineEdit = $UI/WorldGeneration/VBoxContainer/CellSize/Input_y
 @onready var start_paused_button: CheckBox = $UI/WorldGeneration/VBoxContainer/FinalRow/StartPausedButton
 
 @onready var messages_label: Label = $UI/Messages/Label
@@ -58,6 +57,8 @@ var previous_generation_count: int = 10 # Number of generations to check for evo
 #  4 Collisions out of 10 previous_generation_count seems reasonable although it may not be quite enough
 var collision_count_limit: int = 4
 
+var timer_speeds: Array = [0.1, 0.08, 0.05, 0.03, 0.01] # The speeds for the generation_timer for selection from the UI
+
 
 func _ready() -> void:
 	update_generation_ui()
@@ -96,8 +97,6 @@ func update_generation_ui() -> void:
 		generation_seed.text = str(randi())
 	generation_world_size_x.text = str(world_size.x)
 	generation_world_size_y.text = str(world_size.y)
-	generation_cell_size_x.text = str(cell_size.x)
-	generation_cell_size_y.text = str(cell_size.y)
 	start_paused_button.button_pressed = false
 
 
@@ -282,6 +281,11 @@ func _on_generation_timer_timeout() -> void:
 
 	generation_timer.start()
 
+func _on_generation_speed_drag_ended(value_changed: bool) -> void:
+	var speed = generation_speed.value - 1
+	if value_changed:
+		generation_timer.wait_time = timer_speeds[speed]
+
 func _on_quit_button_pressed() -> void:
 	get_tree().quit()
 
@@ -291,7 +295,6 @@ func _on_run_button_pressed() -> void:
 	else:
 		world_seed = randi()
 	world_size = Vector2(int(generation_world_size_x.text), int(generation_world_size_y.text))
-	cell_size = Vector2(int(generation_cell_size_x.text), int(generation_cell_size_y.text))
 
 	debug_ui.visible = true
 	generation_ui.visible = false
diff --git a/world.tscn b/world.tscn
index 00b61d6..34bb05e 100644
--- a/world.tscn
+++ b/world.tscn
@@ -139,41 +139,30 @@ text = "32"
 max_length = 4
 select_all_on_focus = true
 
-[node name="CellSize" type="HBoxContainer" parent="UI/WorldGeneration/VBoxContainer"]
+[node name="GenerationSpeed" type="HBoxContainer" parent="UI/WorldGeneration/VBoxContainer"]
 layout_mode = 2
-theme_override_constants/separation = 6
 
-[node name="Label" type="Label" parent="UI/WorldGeneration/VBoxContainer/CellSize"]
-custom_minimum_size = Vector2(120, 0)
+[node name="Label" type="Label" parent="UI/WorldGeneration/VBoxContainer/GenerationSpeed"]
 layout_mode = 2
-text = "Cell Size"
+text = "Generation Speed"
 
-[node name="Padding" type="VSeparator" parent="UI/WorldGeneration/VBoxContainer/CellSize"]
+[node name="Padding" type="VSeparator" parent="UI/WorldGeneration/VBoxContainer/GenerationSpeed"]
 modulate = Color(1, 1, 1, 0)
 layout_mode = 2
 size_flags_horizontal = 3
 
-[node name="Label_x" type="Label" parent="UI/WorldGeneration/VBoxContainer/CellSize"]
-layout_mode = 2
-text = "X:"
-
-[node name="Input_x" type="LineEdit" parent="UI/WorldGeneration/VBoxContainer/CellSize"]
-custom_minimum_size = Vector2(20, 0)
-layout_mode = 2
-text = "16"
-max_length = 4
-select_all_on_focus = true
-
-[node name="Label_y" type="Label" parent="UI/WorldGeneration/VBoxContainer/CellSize"]
+[node name="Input" type="HSlider" parent="UI/WorldGeneration/VBoxContainer/GenerationSpeed"]
+custom_minimum_size = Vector2(200, 0)
 layout_mode = 2
-text = "Y:"
+tooltip_text = "The higher the speed, the less time between generations.
 
-[node name="Input_y" type="LineEdit" parent="UI/WorldGeneration/VBoxContainer/CellSize"]
-custom_minimum_size = Vector2(20, 0)
-layout_mode = 2
-text = "16"
-max_length = 4
-select_all_on_focus = true
+Slowest: 0.1/s
+Fastest: 0.01/s"
+min_value = 1.0
+max_value = 5.0
+value = 3.0
+tick_count = 5
+ticks_on_borders = true
 
 [node name="FinalRow" type="HBoxContainer" parent="UI/WorldGeneration/VBoxContainer"]
 layout_mode = 2
@@ -214,6 +203,7 @@ layout_mode = 2
 
 [connection signal="timeout" from="GenerationTimer" to="." method="_on_generation_timer_timeout"]
 [connection signal="pressed" from="UI/WorldGeneration/VBoxContainer/Seed/Generate" to="." method="_on_world_seed_generate_pressed"]
+[connection signal="drag_ended" from="UI/WorldGeneration/VBoxContainer/GenerationSpeed/Input" to="." method="_on_generation_speed_drag_ended"]
 [connection signal="toggled" from="UI/WorldGeneration/VBoxContainer/FinalRow/StartPausedButton" to="." method="_on_start_paused_button_toggled"]
 [connection signal="pressed" from="UI/WorldGeneration/VBoxContainer/FinalRow/RunButton" to="." method="_on_run_button_pressed"]
 [connection signal="pressed" from="UI/WorldGeneration/VBoxContainer/FinalRow/QuitButton" to="." method="_on_quit_button_pressed"]