Pretty fun! If I could make a suggestion, maybe recolor the green tiles in levels (make the first level green, the second purple, the third red, etc.) for more visual variety.
Will this game be released commercially?
It needs to be an HTML, flash, java, or Unity game. Mine is HTML. You just set it in the "Kind of Project" section. Then under uploads you have to select the checkbox "This file will be played in browser."
Reading here will help too: https://itch.io/docs/creators/getting-started