This is a list of possible enhancements opened in GitHub, but not being actively worked on. These are all good ideas. If you are thinking of helping the Arcade library by working on one of these, please re-open the issue.
Issue 283 Add ability to draw overlapping polygons with same transparency.
Issue 421 Add support for drawing rounded rectangles.
Issue 433 Add support for bitmapped fonts.
Issue 595 Optimize drawing functions by caching them
After updating to Pyglet 2.x, update text drawing to use Pyglet’s text drawing rather than the Pillow text drawing.
Explore using frame buffers to overlay non-moving text and icons on a scrolling screen.
Add support for Pyglets ImageMouseCursors
Explore using frame buffers to create windows
Issue 291 Load a spritesheet with a texture_region map.
Issue 377 Support basic sprite animations like rotate, flicker, disappear, etc.
Issue 380 Add ability to specify a point the sprite rotates around.
Issue 419 Create function to get sprites at a particular point.
Issue 498 Add lighting effects.
Add bloom effects.
Issue 523 Add sprite trigger/example for onenter / onexit.
Issue 289 Be able to get Sprite position and velocity as vectors.
Be able to load an animated gif as an animated time-based sprite.
Be able to load an Aesprite image directly (Piggy-back of Pyglet support)
Issue 345 Create example showing how to manage multiple windows.
Issue 371 Create example showing how to bounce items off walls.
Issue 397 Add example code showing how to do parallax.
Issue 446 Add more procedural generation examples.
Issue 464 Add example for checkers-like game.
Add example showing how to use lerp or smoothstep for smooth camera panning.