Define the game idea
Choose the target platform
Pick a game genre
Identify the target audience
Set core gameplay mechanics
Create a simple game design document
Select a game engine
Set up the development environment
Build the prototype
Design the user interface
Create or source game assets
Implement controls for touch input
Program game logic
Add audio and visual effects
Test on multiple devices
Fix bugs and optimize performance
Balance difficulty and progression
Add monetization if needed
Prepare app store assets
Publish to the app store
Monitor feedback and update the game