WarpSurface (and all fellow classes) are in a standalone OBSA's package. For convenience it should be in this one.
Some rewrite will be necessary before bundling it here.

Interval is now constant across all Scenes, dealing sometimes to bad experience when they require different time to be shown. An improvement should provide a way to set different interval for each Scene.

Trying to use a language not existing in the dictionaries list, or an invalid key breaks the whole sketch.

Options:

• Throw an exception
• Return a blank string
• Return the language.key string to indicate that there must go a text
• Return a fallback string in the default language

Library classes (like SceneCollection or ScenesIterators) are absolutely tied to their draw implementation.

This is a huge NO-NO

A Drawer should that takes the responsibility of the drawing implementation should be injected for every drawable element.
Actually the Drawable interface is already defined, and all generic / abstract classes should implement it.

Include at least onEnter and onLeave life hooks for Scene classes to allow any kind of initialization or finalization actions, specially when changing is in SceneCollection

SceneIterator is defined as a decorator class for ScenesCollection class, making it very unflexible for extension.

Proposed solution:

• SceneIterator to be an interface abstract class
• SceneIterator to have defined lifecycle hooks
• SceneIterator classes to be injected into ScenesCollection as a dependency.
• SceneIterator classes to be decorable to themselves, but not to ScenesCollection.

Sketch requires to import CoordinateSequenceFilter. Any of the other jts classes are required after compiling, only this one.

The type com.vividsolutions.jts.geom.CoordinateSequenceFilter cannot be resolved. It is indirectly referenced from required .class files