The gameplay feels nice and intuitive. I really like the solution you found to be able to move and shoot at the same time with keyboard only.
The visuals really lack consistency. On the title screen already, the background, the girl, flowers, title, "press to [] start" and space button all have very different styles with different shading, level of details, pixel sizes and pixel interpolation. In the intro, the outlines are different colors and the pixel size is way bigger than the rest of the game. The gameplay scene looks fine, except for the circle around the flowers and texts that should have been pixel art. In my opinion, that's what makes pixel art so hard. I recommend this video that explains pretty well what I'm feeling. And it's not only about pixel size, but about consistency overall.
I also highly recommend changing the theme of your itch page. Finding the default white theme always feels low effort and doesn't compliment your game at all. Changing the colors and font only takes 5 minutes and you can even do it after the submission period is over. Giving a good first impression is always a plus and things like that are so easy that it's a shame to miss out on them. I hope this helps!