first press green flag, then choose pixel size. 24, 30, 40 and 60 are good pixel sizes, though 60 is a bit big.. 1, 2, 3 to hange modes; they influence how your designs will have for shapez, and A,D to choose colors for centerpoints and J,L to choose how long gradients there should be. don't swap modes after starting, it will make it look strange. click a square to make it a centerpoint. you can have any amount of centerpoints in your design. if you want to download your design, press B to remove the borders, then right click on your centerpoint and select "download image"
all by me.