Godot

A plethora of Godot tutorials exist, and many can be found on video hosting platforms.

Assets

Free assets can be found at itchi.io including sprites, sound effects, and music.

Other Game Engines

There are many game engines out there. I’ve included a few below that I’d recommend checking out.

PICO-8

PICO-8 is an 8-bit game engine which is great for creating small prototypes. I’d recommend using the VSCode plug-in as the code editor is also in 8-bit (and personally gave me a huge headache)

GameMakerStudio

GMS has a good learning curve, and has been used to create many indie games. There is a free version avaiable.

Unity

Unity can be quite difficult for beginners to learn, but has been the industry standard for many years.