Initial commit: Godot Pong game with WebSocket accelerometer control.

Includes platform steering via calibrated accel axes, ball physics,
calibration overlay with axis detection, and runtime tuning sliders.

Co-authored-by: Cursor <cursoragent@cursor.com>

scenes/main.tscn

@@ -0,0 +1,149 @@
+[gd_scene load_steps=4 format=3 uid="uid://bmain2dscene01"]
+
+[ext_resource type="Script" path="res://scripts/main.gd" id="1_main"]
+[ext_resource type="Script" path="res://scripts/ball.gd" id="2_ball"]
+[ext_resource type="Script" path="res://scripts/calibration_overlay.gd" id="3_calib"]
+
+[node name="Main" type="Node2D"]
+script = ExtResource("1_main")
+
+[node name="BgLayer" type="CanvasLayer" parent="."]
+layer = -10
+
+[node name="Background" type="ColorRect" parent="BgLayer"]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+mouse_filter = 2
+color = Color(0.08, 0.09, 0.14, 1)
+
+[node name="Platform" type="Polygon2D" parent="."]
+color = Color(0.25, 0.72, 0.95, 1)
+polygon = PackedVector2Array(-80, -12, 80, -12, 80, 12, -80, -12)
+position = Vector2(576, 600)
+
+[node name="Ball" type="Node2D" parent="."]
+position = Vector2(576, 320)
+script = ExtResource("2_ball")
+
+[node name="UiLayer" type="CanvasLayer" parent="."]
+
+[node name="StatusLabel" type="Label" parent="UiLayer"]
+offset_left = 16.0
+offset_top = 12.0
+offset_right = 560.0
+offset_bottom = 40.0
+theme_override_colors/font_color = Color(0.75, 0.8, 0.9, 1)
+theme_override_font_sizes/font_size = 14
+text = "Starting…"
+
+[node name="ThresholdPanel" type="VBoxContainer" parent="UiLayer"]
+offset_left = 16.0
+offset_top = 48.0
+offset_right = 420.0
+offset_bottom = 148.0
+
+[node name="ThresholdCaption" type="Label" parent="UiLayer/ThresholdPanel"]
+layout_mode = 2
+theme_override_colors/font_color = Color(0.75, 0.8, 0.9, 1)
+theme_override_font_sizes/font_size = 14
+text = "Schwellwert: 3000"
+
+[node name="ThresholdSlider" type="HSlider" parent="UiLayer/ThresholdPanel"]
+custom_minimum_size = Vector2(380, 0)
+layout_mode = 2
+size_flags_horizontal = 3
+min_value = 0.0
+max_value = 15000.0
+step = 50.0
+value = 3000.0
+tick_count = 16
+ticks_on_borders = true
+
+[node name="SensitivityCaption" type="Label" parent="UiLayer/ThresholdPanel"]
+layout_mode = 2
+theme_override_colors/font_color = Color(0.75, 0.8, 0.9, 1)
+theme_override_font_sizes/font_size = 14
+text = "Bewegungsstärke: 6 %"
+
+[node name="SensitivitySlider" type="HSlider" parent="UiLayer/ThresholdPanel"]
+custom_minimum_size = Vector2(380, 0)
+layout_mode = 2
+size_flags_horizontal = 3
+min_value = 1.0
+max_value = 100.0
+step = 1.0
+value = 6.0
+tick_count = 11
+ticks_on_borders = true
+
+[node name="AccelLabel" type="Label" parent="UiLayer"]
+anchors_preset = 3
+anchor_left = 1.0
+anchor_top = 1.0
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_left = -320.0
+offset_top = -72.0
+offset_right = -16.0
+offset_bottom = -20.0
+grow_horizontal = 0
+grow_vertical = 0
+theme_override_colors/font_color = Color(0.9, 0.92, 0.55, 1)
+theme_override_font_sizes/font_size = 16
+horizontal_alignment = 2
+text = "x: —   y: —   z: —"
+
+[node name="RecalibButton" type="Button" parent="UiLayer"]
+visible = false
+anchors_preset = 1
+anchor_left = 1.0
+anchor_right = 1.0
+offset_left = -220.0
+offset_top = 12.0
+offset_right = -16.0
+offset_bottom = 44.0
+grow_horizontal = 0
+text = "Kalibrierung neu starten"
+
+[node name="CalibrationOverlay" type="Control" parent="UiLayer"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+mouse_filter = 0
+script = ExtResource("3_calib")
+
+[node name="HintLabel" type="Label" parent="UiLayer/CalibrationOverlay"]
+layout_mode = 1
+anchors_preset = 5
+anchor_left = 0.5
+anchor_right = 0.5
+offset_left = -360.0
+offset_top = 80.0
+offset_right = 360.0
+offset_bottom = 140.0
+grow_horizontal = 2
+theme_override_colors/font_color = Color(0.9, 0.92, 0.98, 1)
+theme_override_font_sizes/font_size = 20
+horizontal_alignment = 1
+autowrap_mode = 3
+text = "Kalibrierung"
+
+[node name="StartButton" type="Button" parent="UiLayer/CalibrationOverlay"]
+layout_mode = 1
+anchors_preset = 7
+anchor_left = 0.5
+anchor_top = 1.0
+anchor_right = 0.5
+anchor_bottom = 1.0
+offset_left = -140.0
+offset_top = -120.0
+offset_right = 140.0
+offset_bottom = -72.0
+grow_horizontal = 2
+text = "Kalibrierung starten"