Many challanges at making this picture, first of all, needing to rest the hand from time to time, despite being very focused on the painting, but I still need to measure my amount of time working (I'm getting better!); then the fact that it had to be very colorful and even with that making pop out the characters; making a central composition; and the last one but that was my own decision: making everything only in two layers: background and characters.
You can see the time-lapse process video on the first comment on this submission of my Telegram Art Channel: https://t.me/panda_paco