Create a new project in Scratch
Delete the default cat sprite if you want
Choose or draw a main button sprite
Add a variable named Score
Set Score to 0 when the green flag is clicked
Add a script to the button sprite
Use the block `when this sprite clicked`
Add the block `change Score by 1`
Add a score display on the stage
Add a backdrop if desired
Duplicate the button sprite or add more clickable sprites if needed
Add sound effects to the click action if desired
Add costumes to animate the button when clicked
Add a timer or upgrades if you want more features
Save the project
Test the game by clicking the button repeatedly