this is actually one of my favorite games on this website. The simplicity in both the art style and gameplay is what makes it so good.
edit; if this comment does get any traction and perhaps the dev sees it, you should add a palette feature much like downwell- just a recommendation.
second edit: a restart key would be good so that if you get hit at the beginning of the run and just don't feel good about it you can restart instantly instead of what I usually.