We've not tested installation guide for Linux very well, and we have found some issues (e.g., hajimehoshi/ebiten#1146).

To solve this, we can have Docker files for various distributions, and test them regularly.

I'm currently in the process of adding the quadtree implementation to my JS13k 2019 game. My game utilizes line segments and I decided to add the bounding boxes of line segments to the quadtree. Sometimes, line segments have no height, e.g. the line segment from (320,320) to (640,320) has the bounding box {x: 320, y:320, width: 320, height: 0}. Wh

Alt+ mnemonic navigation works for a window which doesn't have focus: in test app open edit colour dialog and press Alt+C (grabbed by main window).

A lot of the SDL events are missing or not fully defined in the code.

Document should be short and contain basic information about pixiq package primitives (Image, Selection, Color, Screen, Loop) and coordinate system used by Pixiq (origin is on top-left corner, x is always before y in method signatures etc.). It should be approachable by beginner. Experiment with visual documentation - maybe create Pixel Art animated image describing basic primitives?