diff --git a/document.tscn b/document.tscn
index 46dd8cb..741a672 100644
--- a/document.tscn
+++ b/document.tscn
@@ -1,658 +1,100 @@
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-[node name="dt-153" type="Control" parent="Document/root-685/body-903/dl-693"]
-anchors_preset = 0
-offset_top = 253.0
-offset_right = 54.5
-offset_bottom = 276.0
-
-[node name="a-969" type="Label" parent="Document/root-685/body-903/dl-693/dt-153"]
-layout_mode = 0
-offset_right = 53.0
-offset_bottom = 23.0
-theme_override_colors/font_color = Color(0, 0, 1, 1)
-theme_override_font_sizes/font_size = 16
-text = "People"
-
-[node name="dd-652" type="Control" parent="Document/root-685/body-903/dl-693"]
-anchors_preset = 0
-offset_left = 40.0
-offset_top = 276.0
-offset_right = 386.5
-offset_bottom = 299.0
-
-[node name="TEXT-234" type="Label" parent="Document/root-685/body-903/dl-693/dd-652"]
-layout_mode = 0
-offset_right = 345.0
-offset_bottom = 23.0
-theme_override_colors/font_color = Color(0, 0, 0, 1)
-theme_override_font_sizes/font_size = 16
-text = "A list of some people involved in the project."
-
-[node name="dt-723" type="Control" parent="Document/root-685/body-903/dl-693"]
-anchors_preset = 0
-offset_top = 299.0
-offset_right = 57.5
-offset_bottom = 322.0
-
-[node name="a-888" type="Label" parent="Document/root-685/body-903/dl-693/dt-723"]
-layout_mode = 0
-offset_right = 56.0
-offset_bottom = 23.0
-theme_override_colors/font_color = Color(0, 0, 1, 1)
-theme_override_font_sizes/font_size = 16
-text = "History"
-
-[node name="dd-315" type="Control" parent="Document/root-685/body-903/dl-693"]
-anchors_preset = 0
-offset_left = 40.0
-offset_top = 322.0
-offset_right = 352.5
-offset_bottom = 345.0
-
-[node name="TEXT-548" type="Label" parent="Document/root-685/body-903/dl-693/dd-315"]
-layout_mode = 0
-offset_right = 311.0
-offset_bottom = 23.0
-theme_override_colors/font_color = Color(0, 0, 0, 1)
-theme_override_font_sizes/font_size = 16
-text = "A summary of the history of the project."
-
-[node name="dt-76" type="Control" parent="Document/root-685/body-903/dl-693"]
-anchors_preset = 0
-offset_top = 345.0
-offset_right = 127.0
-offset_bottom = 368.0
-
-[node name="a-59" type="Label" parent="Document/root-685/body-903/dl-693/dt-76"]
-layout_mode = 0
-offset_right = 116.0
-offset_bottom = 23.0
-theme_override_colors/font_color = Color(0, 0, 1, 1)
-theme_override_font_sizes/font_size = 16
-text = "How can I help"
-
-[node name="TEXT-830" type="Label" parent="Document/root-685/body-903/dl-693/dt-76"]
-layout_mode = 0
-offset_left = 117.5
-offset_right = 125.5
-offset_bottom = 23.0
-theme_override_colors/font_color = Color(0, 0, 0, 1)
-theme_override_font_sizes/font_size = 16
-text = "?"
-
-[node name="dd-186" type="Control" parent="Document/root-685/body-903/dl-693"]
-anchors_preset = 0
-offset_left = 40.0
-offset_top = 368.0
-offset_right = 332.5
-offset_bottom = 391.0
-
-[node name="TEXT-389" type="Label" parent="Document/root-685/body-903/dl-693/dd-186"]
-layout_mode = 0
-offset_right = 291.0
-offset_bottom = 23.0
-theme_override_colors/font_color = Color(0, 0, 0, 1)
-theme_override_font_sizes/font_size = 16
-text = "If you would like to support the web.."
-
-[node name="dt-644" type="Control" parent="Document/root-685/body-903/dl-693"]
-anchors_preset = 0
-offset_top = 391.0
-offset_right = 100.5
-offset_bottom = 414.0
-
-[node name="a-484" type="Label" parent="Document/root-685/body-903/dl-693/dt-644"]
-layout_mode = 0
-offset_right = 99.0
-offset_bottom = 23.0
-theme_override_colors/font_color = Color(0, 0, 1, 1)
-theme_override_font_sizes/font_size = 16
-text = "Getting code"
-
-[node name="dd-372" type="Control" parent="Document/root-685/body-903/dl-693"]
-anchors_preset = 0
-offset_left = 40.0
-offset_top = 414.0
-offset_right = 358.5
-offset_bottom = 437.0
-
-[node name="TEXT-189" type="Label" parent="Document/root-685/body-903/dl-693/dd-372"]
-layout_mode = 0
-offset_right = 153.0
-offset_bottom = 23.0
-theme_override_colors/font_color = Color(0, 0, 0, 1)
-theme_override_font_sizes/font_size = 16
-text = "Getting the code by"
-
-[node name="a-817" type="Label" parent="Document/root-685/body-903/dl-693/dd-372"]
-layout_mode = 0
-offset_left = 154.5
-offset_right = 278.5
-offset_bottom = 23.0
-theme_override_colors/font_color = Color(0, 0, 1, 1)
-theme_override_font_sizes/font_size = 16
-text = "anonymous FTP"
-
-[node name="TEXT-13" type="Label" parent="Document/root-685/body-903/dl-693/dd-372"]
-layout_mode = 0
-offset_left = 280.0
-offset_right = 317.0
-offset_bottom = 23.0
-theme_override_colors/font_color = Color(0, 0, 0, 1)
-theme_override_font_sizes/font_size = 16
-text = ", etc."
+[connection signal="pressed" from="Control/PanelContainer/VBoxContainer/Button" to="Document" method="on_refresh"]
diff --git a/project.godot b/project.godot
index 9eb93be..0216467 100644
--- a/project.godot
+++ b/project.godot
@@ -15,6 +15,19 @@
 config/features=PackedStringArray("4.3", "Forward Plus")
 config/icon="res://icon.svg"
 
+[display]
+
+window/size/viewport_width=1920
+window/size/viewport_height=1080
+window/stretch/mode="canvas_items"
+
+[physics]
+
+2d/default_gravity_vector=Vector2(0, 0)
+2d/default_linear_damp=3.257
+2d/solver/solver_iterations=128
+2d/solver/contact_max_allowed_penetration=0.32
+
 [rendering]
 
 environment/defaults/default_clear_color=Color(1, 1, 1, 1)
diff --git a/scripts/document.gd b/scripts/document.gd
index b5c8846..391db3b 100644
--- a/scripts/document.gd
+++ b/scripts/document.gd
@@ -1,5 +1,4 @@
-@tool
-extends EditorScript
+extends Node2D
 
 func _create_block_node(block: Layout.BlockNode) -> Node:
 	var box = Control.new()
@@ -8,32 +7,46 @@
 	box.size = block.rect.size
 	return box
 
-func _create_text_fragment(parent: Node, fragment: Layout.TextFragment) -> Node:
-	var label = Label.new()
-	label.text = fragment.text
-	label.name = fragment.dom_node.tag_name + "-" + str(randi_range(0, 1000))
-	label.position = fragment.rect.position
-	label.size = fragment.rect.size
-
+func _apply_label_style(label: Label, fragment: Layout.TextFragment):
 	var style = fragment.dom_node.style
 	label.set('theme_override_font_sizes/font_size', style.font_size)
 	label.set('theme_override_colors/font_color', style.text_color)
 
-	parent.add_child(label, true)
-	label.set_owner(get_editor_interface().get_edited_scene_root())
-	return label
+func _create_text_fragment_with_rigid_body(parent: Node, fragment: Layout.TextFragment) -> Node:
+	var rigid_body = RigidBody2D.new()
+	rigid_body.name = fragment.dom_node.tag_name + "-" + str(randi_range(0, 1000))
+	rigid_body.position = fragment.rect.position
+	rigid_body.input_pickable = true
+
+	var shape = CollisionShape2D.new()
+	shape.shape = RectangleShape2D.new()
+	shape.shape.size = fragment.rect.size
+	shape.translate(fragment.rect.size / 2)
+
+	var label = Label.new()
+	label.text = fragment.text
+	label.size = fragment.rect.size
+	_apply_label_style(label, fragment)
+
+	rigid_body.add_child(label)
+	rigid_body.add_child(shape)
+	parent.add_child(rigid_body)
+	return rigid_body
 
 func _create_block(parent: Node, block: Layout.BlockNode):
 	var box = _create_block_node(block)
 	parent.add_child(box, true)
-	box.set_owner(get_editor_interface().get_edited_scene_root())
 
 	for block_child in block.block_children:
 		_create_block(box, block_child)
 	for text_fragment in block.text_fragments:
-		_create_text_fragment(box, text_fragment)
+		# _create_text_fragment(box, text_fragment)
+		_create_text_fragment_with_rigid_body(box, text_fragment)
 
-func _run() -> void:
+func on_refresh() -> void:
+	for child in get_children():
+		remove_child(child)
+
 	var file = FileAccess.open("res://TheProject.html", FileAccess.READ);
 	var source = file.get_as_text()
 
@@ -41,7 +54,7 @@
 	var dom_tree = DOM.build_dom_tree(parser)
 	var layout_tree = Layout.build_layout_tree(dom_tree)
 	layout_tree.layout(1000)
-	layout_tree.debug_print()
+	_create_block(self, layout_tree)
 
-	var document_node = get_editor_interface().get_edited_scene_root().get_node('Document')
-	_create_block(document_node, layout_tree)
+func _ready():
+	on_refresh()
diff --git a/scripts/physics_drag.gd b/scripts/physics_drag.gd
new file mode 100644
index 0000000..ad035f5
--- /dev/null
+++ b/scripts/physics_drag.gd
@@ -0,0 +1,33 @@
+extends Node2D
+
+var selected_body: RigidBody2D = null
+var drag_position: Vector2 = Vector2.ZERO
+
+func _on_mouse_down(event: InputEventMouseButton):
+	var space_state = get_world_2d().direct_space_state
+	var query = PhysicsPointQueryParameters2D.new()
+	query.position = event.position
+	var result = space_state.intersect_point(query)
+	
+	if len(result) > 0:
+		selected_body = result[0]['collider']
+		drag_position = selected_body.global_transform.inverse() * event.position
+
+func _on_mouse_up(event: InputEventMouseButton):
+	selected_body = null
+
+func _process(delta: float):
+	if selected_body == null:
+		return
+
+	var mouse_position = get_viewport().get_mouse_position()
+	var anchor_position = selected_body.global_transform * drag_position
+	var force = mouse_position - anchor_position
+	selected_body.apply_impulse(force, anchor_position - selected_body.global_position)
+
+func _input(event: InputEvent) -> void:
+	if event is InputEventMouseButton:
+		if event.is_pressed():
+			_on_mouse_down(event as InputEventMouseButton)
+		else:
+			_on_mouse_up(event as InputEventMouseButton)
diff --git a/scripts/style.gd b/scripts/style.gd
index 4975b30..2fbba30 100644
--- a/scripts/style.gd
+++ b/scripts/style.gd
@@ -4,16 +4,17 @@
 	var style = Style.new()
 	style.font_size = parent_style.font_size
 	style.text_color = parent_style.text_color
+	# NOTE: Margin not inherited.
 	return style
 
 static func apply_default_style_for_element(tag_name: String, parent_style: Style) -> Style:
 	var style = _copy_style(parent_style)
 	match tag_name:
 		'body':
-			style.margin_top = 5
-			style.margin_bottom = 5
-			style.margin_left = 5
-			style.margin_right = 5
+			style.margin_top = 10
+			style.margin_bottom = 10
+			style.margin_left = 10
+			style.margin_right = 10
 		'h1':
 			style.font_size = 30
 			style.margin_top = 20
diff --git a/scripts/toggle_gravity.gd b/scripts/toggle_gravity.gd
new file mode 100644
index 0000000..7487637
--- /dev/null
+++ b/scripts/toggle_gravity.gd
@@ -0,0 +1,16 @@
+extends CheckBox
+
+func _wake_up_all(node: Node):
+	if node is RigidBody2D:
+		var body = node as RigidBody2D
+		body.apply_impulse(Vector2.ZERO)
+	for child in node.get_children():
+		_wake_up_all(child)
+
+func _toggled(toggled_on: bool) -> void:
+	PhysicsServer2D.area_set_param(
+		get_world_2d().space,
+		PhysicsServer2D.AREA_PARAM_GRAVITY_VECTOR,
+		Vector2(0, 1 if toggled_on else 0),
+	)
+	_wake_up_all(get_tree().root)