when you run the project, you should see a thingy that asks how wide your animation is. your answer determines the amount of pixels per row. same goes for the height, but it sets how many pixel per column. here's some keyboard shortcuts. 1 - previous frame 2 - next frame 3 - remove frame 4 - add frame 5 - decrease hue 6 - increase hue 7 - decrease saturation 8 - increase saturation 9 - decrease brightness 10 - increase brightness S - save animation as s3m code L - load animation from s3m code space - play animation you can also use a color picker by just not moving your cursor for a moment then clicking. if you click off the screen then it breaks everything so just don't okay also the color in the bottom right shows the brush color
you can use the s3m codes in other projects by copying the custom blocks that have parameters.