game-feel Checked

1. **Confirm the event hooks exist.** Juice attaches to discrete events: on_hit, on_land,

on_pickup, on_death, on_fire. If the mechanic doesn't emit these, add them first.

2. **Pick feedback channels per event** from the menu (sound, particles, shake, hit-stop,

flash, knockback, tween, number pop). Start with 2–3; add until it reads, then stop.

3. **Make motion eased, not linear.** Route scale/position/UI changes through a tween with an

ease (overshoot for "pop", ease-out for "settle"). Linear motion feels robotic.

4. **Reserve hit-stop and shake for impact.** They are the strongest, most abusable tools —

short durations, scaled to importance, and never on routine actions.

5. **Keep feedback off the critical simulation.** Shake moves the *camera/visual*, not the

body; hit-stop uses time scale or a real-time pause, not a gameplay-logic stall.

6. **Tune by importance tiers.** Define small/medium/large feedback presets and assign events

to a tier, so the whole game's juice stays consistent and proportional.

7. **Verify by playing and watching.** Trigger the event repeatedly; confirm the feedback

fires, returns to rest, and is not nauseating or input-blocking. Report what you observed

(does shake decay? does input still register during hit-stop?).

Patterns

### 1. Screen shake by decaying "trauma" (smooth, not a random jitter)

# Godot 4.7. Store trauma 0..1; shake = trauma^2 so small hits barely move, big hits punch.
# Drives a Camera2D OFFSET (the visual), never the player body. Decays every frame.
@export var decay := 1.2          # trauma lost per second
@export var max_offset := Vector2(12, 8)
@export var max_roll := 0.1       # radians
var trauma := 0.0
var _t := 0.0

func add_trauma(amount: float) -> void:
    trauma = clampf(trauma + amount, 0.0, 1.0)   # hits ADD; they don't reset

func _process(dt: float) -> void:
    if trauma <= 0.0: return
    trauma = maxf(trauma - decay * dt, 0.0)
    var shake := trauma * trauma                  # quadratic: gentle low, sharp high
    _t += dt * 30.0
    # Smooth pseudo-random via sampled noise/sin, NOT rand each frame (that buzzes).
    offset = Vector2(max_offset.x * shake * sin(_t * 1.7),
                     max_offset.y * shake * sin(_t * 2.3))
    rotation = max_roll * shake * sin(_t * 1.1)
# Unity 6.3 LTS: identical model on a CinemachineCamera via CinemachineBasicMultiChannelPerlin
# (set AmplitudeGain/FrequencyGain from trauma^2) — see camera-systems.

### 2. Hit-stop / freeze frame (sell impact by briefly stopping time)

# Godot 4.7. Drop time scale, then restore after a REAL-TIME delay (unaffected by time_scale).
func hit_stop(duration := 0.08, scale := 0.05) -> void:
    Engine.time_scale = scale
    # 4th arg ignore_time_scale=true → the timer still fires while the game is frozen.
    await get_tree().create_timer(duration, true, false, true).timeout
    Engine.time_scale = 1.0

// Unity 6.3 LTS (C#). WaitForSecondsRealtime ignores Time.timeScale, so the timer still elapses.
IEnumerator HitStop(float duration = 0.08f, float scale = 0.05f) {
    Time.timeScale = scale;
    yield return new WaitForSecondsRealtime(duration);
    Time.timeScale = 1f;            // RIGHT: real-time wait. WRONG: WaitForSeconds (never resumes at scale 0)
}

### 3. Squash & stretch + overshoot via an eased tween (the "pop")

# Godot 4.7. Conserve volume: stretch one axis, squash the other, then spring back with overshoot.
func pop(node: Node2D) -> void:
    node.scale = Vector2(1.3, 0.7)                       # instant squash on the event
    var tw := create_tween()
    tw.tween_property(node, "scale", Vector2.ONE, 0.18) \
      .set_trans(Tween.TRANS_BACK).set_ease(Tween.EASE_OUT)   # BACK = overshoots past 1, settles
# RIGHT: ease back (TRANS_BACK/ELASTIC) for life. WRONG: linear tween → mechanical, dead.

### 4. A feedback bundle scaled by importance (keep juice proportional)

# One call per event; the tier decides intensity so the whole game stays consistent.
func feedback(event_pos: Vector2, tier: String) -> void:
    match tier:
        "small":  AudioBus.play("tick");  Camera.add_trauma(0.15)
        "medium": AudioBus.play("hit");   Camera.add_trauma(0.4);  hit_stop(0.05); spawn_particles(event_pos, 6)
        "large":  AudioBus.play("boom");  Camera.add_trauma(0.8);  hit_stop(0.12); spawn_particles(event_pos, 30); flash_white(0.06)

Pitfalls

• **Shaking the player/body instead of the camera offset** desyncs collision and aim. Shake

the camera (or a visual pivot), never the simulated transform.

• **Random offset every frame** buzzes like static. Drive shake from sampled noise/sin and a

decaying trauma value so it's smooth and self-ending.

• **Hit-stop with WaitForSeconds / a scaled timer** never resumes (at time scale 0 the timer

never advances). Use a real-time wait (WaitForSecondsRealtime, or Godot's

ignore_time_scale timer).

• **Hit-stop on every frame of a held attack** locks the game. Trigger it once per impact.
• **Linear tweens everywhere** feel robotic. Ease almost everything; reserve overshoot

(BACK/ELASTIC) for "pop" and ease-out for "settle".

• **Permanent exaggeration** (scale never returns, shake never decays) becomes the new normal

and stops reading as feedback. Juice must return to rest.

• **Over-juicing routine actions** (full shake + hit-stop on every footstep) causes nausea and

hides real impacts. Scale to importance; add a "reduce screen shake"/"reduce flashing"

accessibility option.

• **Feedback that blocks input** (long freeze, un-cancelable animation) hurts responsiveness.

Keep juice short and let input buffer through it.

References

• For the trauma-shake math, easing-curve cheat sheet (which ease for pop vs settle), knockback

+ flash + number-pop recipes, importance-tier presets, and per-engine tween/particle bindings,

read references/feedback-recipes.md.

Related skills

• camera-systems — owns camera follow/deadzone/orbit;