Open the app, tap 'New Project', choose your canvas size and color scheme, then start creating by tapping on the grid.

Yes, tap the 'Save' button to save your current work at any time. You can also name your project for easy identification.

Yes, use the 'Undo' feature located under the 'Edit' menu to revert your last action or series of actions.

Select the pixel you want to change, choose a new color from the palette, and tap the selected pixel to apply the color change.