The Invader Clones are created in a repeat loop. But each Invader Clone starts moving downwards when it is created rather than waiting until all Invader Clones have been created. We create the clones from left to right, so the clones at the left of each row start moving down first. We create the rows of clones from top to bottom, so the clones in the higher rows start moving down first. In this project the clones move down fast enough that they overlap with the clones still being created in the row below. Toshihiro Nishikado of Japan wrote Space Invaders for Taito in 1978. Japan had to mint extra 100 Yen coins solely because of the demand for the coins for the game. Space Invaders became an international hit and was hugely responsible for popularizing arcade games.
This tutorial discusses How Scratch Projects Run: https://scratch.mit.edu/discuss/post/3680398/ and then this Space Invaders project and fixes: https://scratch.mit.edu/discuss/post/3680412/ This project is one of the best fixes: https://scratch.mit.edu/projects/328891332/ Toshihiro Nishikado of Japan wrote Space Invaders for Taito in 1978. Japan had to mint extra 100 Yen coins solely because of the demand for the coins for the game. Space Invaders became an international hit and was hugely responsible for popularizing arcade games.