The first thing that struck me with this piece was the creative idea. I love the idea of a bathtub, a confined place that becomes a world, like our own mind.
I like the details around the tub as well, but I found they took away from the piece as a whole, because they're distracting from the 'world of imagination' inside the tub. A more simplified background might have worked better, or a difference in saturation of colour between the tub and floor to draw more attention to the tub.
Overall, the impact of this piece is wonderful! Nice work!
Really cute! I like this concept and how you presented it. Nice coloring as well as very good attention to detail, like in the wallpaper and between the tiles on the floor.
My only comments would be to double check the toes on the front leg as they look like one toe is missing and slightly large and round, and maybe lower the nose to elongate the face a little more. You could also pull the jaw in a bit or put the head back further as the distance from neck to chin seems a tad too long. My eye is drawn right to the center, but stays there. Could just be me but, maybe try adding something with a similar brightness to his skin near the cat or something to create more of a sense of movement both in and around the tub? Those would be my only few suggestions.
I always wanted to have a bath overflowing with bubbles but now it would be only me having to clean it up XD Overall, really well done! Hope this helps a little.
I think the criticism is just one opinion. For example, face and toes - awesome. Secondly, the details around the bathtub are what makes this picture whimsical. This is something that I would think about properly as a child. I would take into account every little element of this illustration because there is no doubt that the devil is in the details. As an artist, you did an unbelievable job and you should keep going.
In my humble opinion, it is the details in this piece surrounding the bathtub as well as the tub itself, that breaks through the confines of what is normal and into the realm of imagination. Would Harry Potter have worked without all the details? Of course not.
I wish I could do what you do - you should never stop doing this kind of stuff, unless it makes you unhappy. Good job. I applaud you.