I did something with Custom Blocks! :D Though it's simple, it took me a bit to figure out. So, press the left arrow key to move to the left, and press the right arrow key to move to the right. Press the Up arrow key to jump, and the Down arrow key to move down. You can use multiple arrow keys at once to walk diagonally. Press Space to spin to the right, and L to spin to the left. Press f to spin to the right forever, and g to spin to the left forever. Press R to reset Scratch's position, press M or the Green Flag to start music, and S to stop Scratch dead in his tracks and to mute the music. (When S is pressed, it won't reset Scratch to his starting position. It will simply just stop Scratch's movement, but nothing else.) Press Q to switch backdrops. (There are only 2) Pretty simple, right?
Sorry for the long instructions, btw :P Maybe I'll change the backdrop, maybe i wont. ;) Maybe I'll put some new characters in, who knows? :D SCRATCH IS MAGICAL, HE HAS WINGS. HE CAN FLY. CONFIRMED.