You can start building casual games in any 2D platform. Both https://love2d.org/ https://love2d.org/ and https://coronalabs.com/ https://coronalabs.com/ are fre

You can start building casual games in any 2D platform. Both https://love2d.org/ https://love2d.org/ and https://coronalabs.com/ https://coronalabs.com/ are free (Corona SDK has a enterprise version as well) and both use Lua. There are decent tutorials on the web and you can build a small casual game in a couple of days. There are tons of HTML5 game libraries as well but with Love2d and Corona SDK, you can build native games.