Make an Endless Run Game on Scratch

What can we use if we can't access Scratch online or don't want to draw running costumes?

If you can't use the Scratch website, download Scratch Desktop to 'Open Scratch and click "Create"', and if drawing running costumes is hard, duplicate and flip a built-in sprite costume or use two frames of a built-in runner sprite as your player's two running costumes.

Why does my player sometimes fall through the ground or not jump, and how do I fix it?

If the jump doesn't work or the player falls through the ground, make sure the 'vy' variable is created for the player sprite only, the ground sprite's y position matches the y used in the obstacle clone script, and change the 'if touching [ground]' check to 'if y <= (ground y + 5)' or align the ground sprite precisely so the 'when space key pressed' block can detect the ground reliably.

How can I adapt the game for different ages or skill levels?

For younger players slow the game by increasing the obstacle spawn wait to 2–3 seconds, reduce the clone movement to change x by -3, and increase jump height by setting vy to 14 for easier landing, while for older kids make it harder by decreasing the wait to 0.8 seconds, increasing clone speed to change x by -7, and adding multiple obstacle sprites.

What are simple ways to expand or personalize the endless runner once the basics work?

Enhance the project by adding sound effects on jump and collision, create a 'power-up' sprite that clones and when touched increases the score or sets a 'speed' variable to slow obstacles temporarily, add a 'when I receive [game over]' backdrop that shows a custom Game Over screen, and then share the finished creation on DIY.org.