Welcome to Sketch Maker Pro, the first ever drawing project I have ever done! I know it's not the best and it has a few problems, like how you can't save your art, you can draw when you are picking a color from the color tray, and you can't change the size when drawing.
Press space to pick a color from the color tray, and start drawing!
hmmm....I could have sworn I saved the code that changes the costume from clicking on the color tray....It must be some weird glitch where it doesn't save or I must be having so much trouble with saving code- grrrr....now I have to redo the whole code that changes the color, how frustrating....
Reading your mind, I see that at some point in the past you understood what the problem is, because there's a loose GO TO BACK LAYER block in the color tray's scripting area. That needs to be in the startup script for that sprite, and -- it took me a while to understand this -- also in the startup script for the Sprite sprite, because otherwise that one is always right under the mouse and that's the one that gets the click.
You see, I tried doing that for a little while, even compared it to the one that has the color picker, and it just isn't the same. I don't know what I got wrong-