Hello! My name is Elite. I'm 11 years old and I've been coding with blocks since I was 8. I might be AFK for a couple of weeks. Only contact me on weekends. Please! Thank you!

This is a platform I'm remaking since it's already a real game. I decided to bring it to Scratch because it's cute and maybe a little deep. Can someone please teach me how to do thumbnails?! Thanks!!!