Javascript Tile Map tutorial
https://technologies4.me/browse/game-development/tile-based-c2/
https://technologies4.me/articles/tile-map-canvas-javascript-a1/drawing-canvas-tile-map-1/

Tilemap/canvas tutorial
https://www.creativebloq.com/html5/build-tile-based-html5-game-31410992

Random map build tutorial
https://journal.stuffwithstuff.com/2014/12/21/rooms-and-mazes/

Javascript game design tutorial
https://www.briankoponen.com/briankoponen.com/html5-javascript-game-tutorial/

Various Resources
https://js13kgames.github.io/resources/

Javascript design patterns:
https://www.toptal.com/javascript/comprehensive-guide-javascript-design-patterns

Misc.
https://en.wikipedia.org/wiki/Kuwahara_filter
https://www.gamasutra.com/blogs/AlvaroSalvagno/20191213/355660/Inspiration_is_an_excuse__practical_tools_for_game_designers.php