The demos

Every demo in games/ is a working game or scene built only from the engine's own blocks. Each one has a README that explains it the same way, so you can use any of them as the starting point for a game of your own:

Section	What it tells you
Run it	The executable, the build option it needs, the environment switches
Controls	Keyboard, mouse and controller, checked against the input code
How it plays	The rules, the goal, the menus
How it works	System by system: what runs each frame, in which file, and why
Design decisions	What was chosen, why, and what was left out
Tuning	The numbers that change the feel, and where they live
Engine features it uses	Which engine blocks, with links to their guides
Assets	Exactly which files and Synty packs it loads, and what happens without them
Make a game like this	The steps from a copy of the demo to your own game
Files	Every source file and what is in it

Run any demo from build/bin/ (building: BUILDING.md). KKE_SKIP_INTRO=1 skips the logo intro.

Which demo to start from

You want to make...	Start from	Then look at
Your first game, in Lua only	starter game	first Lua game, the cookbook
A race or a party game for the couch, with online play	Climb Race	the start menu, networking
A driving game: races, drifting, a destruction derby, a rally, damage	Racing	vehicles, particle effects, the start menu
A flying, driving or other vehicle game; flight sticks	Flying	input, the start menu
A party game of many short minigames (Fall Guys, Mario Party, Squid Game style)	Party	Climb Race, the start menu, networking
A sports game, or anything with a soft ball	Tennis	physics (FEMFX), the start menu
A fighting game	Duel	melee combat
An action game against crowds	Goblin Horde	melee combat, AI
A strategy or squad game	Platoon	command kit, commands and orders
A pet, a companion, or animals that react to you	Pet companion, Farm	AI
Creatures that walk without animation clips	Procedural animation	procedural animation
Characters that run in any direction, play clips made for another skeleton, or reach with long chains	Animation	movement, procedural animation
A third-person adventure, or anything using every system at once	kke_demo showcase	the showcase guide
A building or level-editing game, or a game made while playing	Sandbox	play to make
Menus, a HUD, settings, an inventory	RmlUi demo	input
Debug panels and tools for yourself	ImGui demo
Breakable, bendable, squashable things	physics_demo	physics bridge, ragdolls
Lava, melting and pouring	melt_demo
Fire, smoke, explosions, sparks, weather, confetti, magic	particles_demo	particle effects
Props that bend and break (any model pack)	synty_demo, Sandbox	breakables
Ships, naval battles, water, floating and sinking	sea_demo	lobby, networking
A character creator: players make their own realistic person	character_creator	humans
Soft bodies, jelly, jiggling characters	jiggle_demo	jiggle physics
Capes, flags, nets, curtains and blankets	cloth_demo	cloth
Sound that fills a place: rooms, walls, doors, footsteps	audio_demo	audio
Store-bought characters: load, skin, pose and ragdoll them	synty_demo	scenes, ragdolls
A small tech demo with a settings panel a controller can drive	any of the six above, or procedural_demo	the demo panel