added a very basic boat simulation

resources/scenes/Level1.tscn

@@ -0,0 +1,10 @@
+[gd_scene load_steps=3 format=2]
+
+[ext_resource path="res://resources/scenes/Player.tscn" type="PackedScene" id=1]
+[ext_resource path="res://resources/scenes/Player.gd" type="Script" id=2]
+
+[node name="Level1" type="Node2D"]
+
+[node name="Player" parent="." instance=ExtResource( 1 )]
+position = Vector2( 304, 152 )
+script = ExtResource( 2 )

resources/scenes/Player.gd

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+extends KinematicBody2D
+
+const WIND = 20
+const SPEED = 400
+const STEERING = deg2rad(5)
+const WINDLIMIT = deg2rad(180-45)
+const WINDDIR = Vector2(0,1)
+const STEERPEN = 1
+const ACCELERATION = 2
+
+var velocity = Vector2(0,10)
+
+func _calculate_velocity(_velocity, _acceleration, _rotation):
+	velocity = _velocity * _acceleration
+	velocity = velocity.clamped(_calculate_maxspeed())
+	return velocity.rotated(_rotation)
+
+func _calculate_maxspeed():
+	var angle_to_wind = WINDDIR.angle_to(velocity)
+	if angle_to_wind > WINDLIMIT || angle_to_wind < -WINDLIMIT:
+		return 0.1
+	else:
+		return 75
+
+func _physics_process(_delta):
+	if Input.is_action_pressed("right"):
+		velocity = _calculate_velocity(velocity, STEERPEN, STEERING)
+		rotate(STEERING)
+	elif Input.is_action_pressed("left"):
+		velocity = _calculate_velocity(velocity, STEERPEN, -STEERING)
+		rotate(-STEERING)
+	else:
+		velocity = _calculate_velocity(velocity, ACCELERATION, 0)
+	velocity = move_and_slide(velocity)
+
+func _ready():
+	pass

resources/scenes/Player.tscn

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+[gd_scene load_steps=3 format=2]
+
+[ext_resource path="res://resources/sprites/bluedotwithline.png" type="Texture" id=1]
+
+[sub_resource type="CircleShape2D" id=1]
+
+[node name="Player" type="KinematicBody2D"]
+
+[node name="Sprite" type="Sprite" parent="."]
+texture = ExtResource( 1 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+scale = Vector2( 5, 5 )
+shape = SubResource( 1 )