Examples

JVM

In Dinoleon by Quillraven you play a dinosaur chamaeleon creature that needs to avoid moving scanning areas by adjusting its color to the scan area's color.
In Mystic Woods by Quillraven you control a player in a top down adventure RPG example game. There is also a YoutTube video tutorial series linked on that repository site to go through the code step by step.
In Starfish Collector by mariorez you play a turtle and swim around the ocean floor while looking for a starfish.
In Space Rocks by mariorez you control a spaceship, whose goal is to shoot lasers and destroy rocks that are flying around the screen.

Fleks example fleks-ecs in the Korge repo
Standalone Korge "Hello World!" project korge-fleks-hello-world with basic Fleks setup