Cascade Lite : UI Toolkit Animation & Tweens

The free core of Cascade — real runtime animation and tweens for UI Toolkit (UIElements, UXML/USS), MIT licensed, zero dependencies.

PLAY IT FIRST - https://twitchedd.itch.io/cascade-blocks

Every pixel of motion in that game is Cascade.

OPEN THE DEMO

After importing: Window > Package Manager > In Project > Cascade Lite > Samples > Import "Demo - Lite Gallery", then open the Gallery scene and press Play.

DOCS - https://twitchedd.github.io/cascade/docs/

Getting started, guides, recipes and the full API reference.

WHAT LITE INCLUDES

- Fluent tween engine for any VisualElement: el.Animate().Fade(1f, .3f).MoveY(0f, .4f)

- The FULL verb set: Fade, MoveX/Y/To, ScaleTo, Rotate, SlideIn, BackgroundColor, TextColor, Width, Height, Size, Top, Left

- Parallel + sequential chaining (.Then()), delays, loops, Pause/Resume/Cancel

- async/await everywhere — every sequence is awaitable, completion-safe on cancel/detach

- Full easing library + AnimationCurve support

- Reduced-motion accessibility gate

- Lifecycle-safe (panel detach auto-cancels), zero per-frame GC

- Demo sample: every Lite feature live with copyable code per section — plus a preview of what Pro adds

WHAT PRO ADDS ($39.99)

Physics springs with velocity handoff (interrupts keep momentum) • stagger across element lists • variants / named states (To("open")) • ready-made enter/exit & screen transitions with display-safe Show/Hide • hover/press/focus micro-interactions • the no-code UIAnimator (selector rules, preset browser, edit-mode live preview) • AI-first JSON authoring with validated schema and self-correcting errors • mesh drop-shadow/glow • 10 Starter Presets. Pro also includes four complete demo screens (game HUD, shop, audio app, dashboard).

Using AI? Lite ships an AI-GUIDE for generating fluent C# with your assistant; Pro adds the validated JSON front door an LLM can't get wrong. Free agent skill for Claude Code / Cursor / Codex: npx skills add twitchedd/cascade-skill

Unity 6000.0+. Clean UPM package. Do not install Lite and Pro together — Pro is a superset.