Click the green flag to start or to reset the graphical effects. These keys change something on the sprite e - changes the ear colour c - changes the costume (choose from 1, 2, 3, or 4 t - changes the transparency until Nano becomes invisible! w - changes the whirl effect ( I've loved this since Scratch 1.4!) Press Space to stop the stage colour effect. it might get on your nerves
Thanks to #GettingUnstuck Day 4 for the inspiration. I chose a different sprite here because I often just stick with Scratch. The biggest decision I had with this project was with how to respond to key presses. Years ago, I started off (with 1.4) using the hat blocks for a game https://scratch.mit.edu/projects/2757068/#player but someone suggested that I use a loop. I tried it and it was smoother. However for this project I found the hat blocks worked better. Compare with https://scratch.mit.edu/projects/235910619/