Godot is a free and opensource game development environment. It is a very light weight program and works well on even low spec machines.
Resources to get you started:
and TONNES MORE
There are lots of great resources out there for learning this software rather than mindlessly following a random YouTube video!
After you have completed a couple of basic tutorials it is time for you to start adding more awesome stuff to your game. You may also want to use this time to try out some of the mechanics that your game idea contains. If you have enemies that move toward the player how do you do that? Some suggestions are below.
2D Platformer
2D enemies
Main Menus and Pause Screen
Lives counters
Pong
Score counter
Main Menus and Pause Screen
Special abilities
Multi-ball
Super Speed
Asteroids
Different difficulties
Main Menus and Pause Screen
Special abilities
Destroy all asteroids
Multi-attack
Godot works really well at exporting projects straight to HTML and onto itch.io.