Ok, first off: Don't belittle your own artwork. It's not cute, nor does it help you grow. We all have to start somewhere and both shown pics are totally fine! For me it's a matter of preference: Which look would you rather like to achieve? The first one is more "clean", but also a little bit more "lifeless" than the second one. The second one offers more texture and a picture book-feel, whereas the first one has more of a "flashy/ polished"-feel. If you chose to work on the second one, I would suggest to decrease the size of the lines on the window, the tentacle-thing and its color seems is a bit too massive, in my opinion. Other than that: I like the vibrant colors in both versions! I'm curious which one you'll use in the end and what kind of story you will tell with it. :)