feat: Implement core game mechanics including player, enemies, bullets, HUD, and level setup.

scenes/hud.tscn

@@ -0,0 +1,98 @@
+[gd_scene load_steps=2 format=3 uid="uid://hud12345678"]
+
+[ext_resource type="Script" path="res://scripts/hud.gd" id="1_hud"]
+
+[node name="HUD" type="CanvasLayer"]
+script = ExtResource("1_hud")
+
+[node name="Control" type="Control" parent="."]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+mouse_filter = 2
+
+[node name="HealthBar" type="ProgressBar" parent="Control"]
+layout_mode = 0
+offset_left = 20.0
+offset_top = 20.0
+offset_right = 220.0
+offset_bottom = 50.0
+value = 100.0
+
+[node name="AmmoContainer" type="VBoxContainer" parent="Control"]
+layout_mode = 1
+anchors_preset = 3
+anchor_left = 1.0
+anchor_top = 1.0
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_left = -150.0
+offset_top = -80.0
+offset_right = -20.0
+offset_bottom = -20.0
+grow_horizontal = 0
+grow_vertical = 0
+
+[node name="APLabel" type="Label" parent="Control/AmmoContainer"]
+layout_mode = 2
+text = "AP: 20"
+horizontal_alignment = 2
+
+[node name="HELabel" type="Label" parent="Control/AmmoContainer"]
+layout_mode = 2
+text = "HE: 10"
+horizontal_alignment = 2
+
+[node name="GameOverScreen" type="Control" parent="."]
+visible = false
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="ColorRect" type="ColorRect" parent="GameOverScreen"]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+color = Color(0, 0, 0, 0.5)
+
+[node name="Label" type="Label" parent="GameOverScreen"]
+layout_mode = 1
+anchors_preset = 8
+anchor_left = 0.5
+anchor_top = 0.5
+anchor_right = 0.5
+anchor_bottom = 0.5
+offset_left = -46.0
+offset_top = -13.0
+offset_right = 46.0
+offset_bottom = 13.0
+grow_horizontal = 2
+grow_vertical = 2
+theme_override_font_sizes/font_size = 32
+text = "GAME OVER"
+
+[node name="RestartButton" type="Button" parent="GameOverScreen"]
+layout_mode = 1
+anchors_preset = 8
+anchor_left = 0.5
+anchor_top = 0.5
+anchor_right = 0.5
+anchor_bottom = 0.5
+offset_left = -48.0
+offset_top = 40.0
+offset_right = 48.0
+offset_bottom = 71.0
+grow_horizontal = 2
+grow_vertical = 2
+text = "Restart"
+
+[connection signal="pressed" from="GameOverScreen/RestartButton" to="." method="_on_restart_button_pressed"]