There are a few really important rules that you should follow to help you make your own game. Here's a couple of great first guides
There are some important ELEMENTS that all games contain that make them fun to play. We're going to consider these ones for your game:
Game play: A game’s rules, plot, objectives, and challenges. In other words what your game is all about.
Game mechanics: How a game works and how a player interacts with it (the controls).
Game art: The scenes and characters - in Scratch called sprites and backdrops
Sound design: A game's background music and sound effects
Scoring: How a player scores and how it is displayed
Challenge: How the game increases in difficulty -making the game harder as it progresses, and how the player can win.
Check out this article:
https://www.gamedesigning.org/gaming/great-games/
When we create a game we start off by developing a Game Design Document.
A Game Design Document (GDD), also known as a design document, is a comprehensive guide that outlines the core design elements and features of a video game.
It serves as a blueprint for the game's development, providing detailed instructions on how it should be created and how it should function.
Create your own game Design Document
I've shared a template for your own GDD through Classroom.
You've come up with some good ideas. Now's the time, however to think. what is my MINIMUM VIABLE PRODUCT?
Put simply, this is the smallest version of a game you can make that can still be played. This is a great way to test that your game will be fun to play.
Look back at your GDD and decide, what is my MVP? Write it down at the bottom. Then that's what you'll make first.