Create a new Scratch project
Delete the default cat sprite if needed
Add a player sprite
Add a platform background
Add ground and platforms as sprites or backdrop elements
Set the player’s starting position
Create variables for x velocity and y velocity
Create a variable for gravity
Create a variable for jump power
Use arrow keys or A/D keys for movement
Change x velocity when left or right keys are pressed
Apply x velocity to the player’s x position
Apply gravity to y velocity every frame
Apply y velocity to the player’s y position
Detect when the player touches a platform
Stop downward movement when landing on a platform
Reset y velocity to zero when grounded
Allow jumping only when the player is on the ground
Change y velocity to jump power when jump key is pressed
Add collision checks for left and right walls
Prevent the player from moving through platforms
Add a scrolling camera if the level is large
Make the camera follow the player
Add hazards like spikes or enemies
Reset the player when touching hazards
Add collectibles like coins or stars
Increase score when collectibles are picked up
Add a goal or finish line
Switch to a win screen when the goal is reached
Add sound effects for jumping, collecting, and winning
Test the platformer and adjust movement speed, gravity, and jump height
Use clones or multiple sprites for more complex levels
Save the project regularly