Decision Tree — Tween vs AnimationPlayer

Situation	Choose
One-off UI juice, hover, popup, score count, recoil	Tween (`create_tween`)
Authored multi-track clips, scrubbable timelines, blend trees	AnimationPlayer / AnimationTree
Camera continuous follow behind a moving target	Camera2D.position_smoothing / spring follow — not a new Tween every `_process`
Menu motion while `Engine.time_scale == 0`	Tween with `set_ignore_time_scale(true)` — MANDATORY time_scale_ignored_ui.gd
Retriggerable property (button spam, dodge cancel)	Kill-before-recreate — MANDATORY safe_tween_interruption.gd
Physics body / net correction motion	`TWEEN_PROCESS_PHYSICS` + `reset_physics_interpolation`

Available Scripts

MANDATORY: Read the script for the case above before writing tween glue.

MANDATORY for any retriggerable tween — kill active tweens before starting new ones.