Click on size to change it (and wipe canvas.) Click on the play/pause to change. Click on grid to toggle. Click on the arrows next to material, or use A and D, to change material. Click on the arrows next to brush size to change it. Click on the X to wipe the canvas.
note: game lags on sizes 75x75+ or so if you fill the whole area, sizes 40x40+ lag scratch's max list size means roughly 425x425 is the limit game lags slightly more with grid on SHARED AS PART OF AN EVENT WHERE I SHARE HALF FINISHED PROJECTS AS A SENDOFF TO THIS ACCOUNT. GO TO THE ACCOUNT "Thivss" FOR FUTURE PROJECTS.