It's glorious! If there's any more tips I can give, if you select the 2nd icon from the top on the far right of the screen, you can resize your works to add more detail! Be sure you set "resize content" to on, to avoid it getting smaller. Try setting it to 64px on your next design! Hitting "create sprite" again will open a new tab for you instead of overwriting your old one! That way you won't lose your progress!
Happy pixel arting!!!