Standalone 2D/3D physics engine for Flutter — collision detection, rigid bodies, ray casting, and spatial grids. Changelog excerpt: Initial release of just_physics_engine. ### Added - 2D rigid-body simulation with PhysicsEngine and PhysicsBody. - Core physical properties including gravity, drag, restitution, friction, torque, and sleeping. - Collision shapes: CircleShape, RectangleShape, and PolygonShape. - Broad-phase collision culling via SpatialGrid. - Collision resolution with impulse response, friction, and positional correction. - Runtime simulation stats via engine.stats. - Debug rendering support via engine.renderD[...]

What exactly do you want? Detect a click anywhere on the screen? Detect a click in some specific area? For specific areas, you can always create an Area2D, and add a CollisionShape2D child to that, and add a RectangleShape to the CollisionShape. Then connect the input_event(…) signal from the Area2D to whatever script you’re using, and use code like the following: func _on_area_2d_input_event(_viewport: Node, event: InputEvent, _shape_idx: int) -> void: if event is InputEventMouseButton and event.button_index == MOUSE_BUTTON_LEFT and event.pressed: print("click") If instead you just want to detect a click anywhere on the screen, use the _input callback: In any script, write: func _input(event): if event is InputEventMouseButton and etc etc etc: do stuff