I really liked the art and the little animations, I also think the music and sound effects fit quit well to the overall game, I would maybe change the font to a more pixel-ish font and maybe add some more vfx (like for example when your direction switches), I think a different death message for when you get too green would also be nice/maybe a mix of death messages. I usually don't really like puzzle games, but I actually liked this one quite a lot. Even without having read the tutorial properly I could get a hang of the mechanics quite quickly, I think you can tell what does what quite easily. (Maybe you could make the tutorial a little more interactive though). I also like how the levels all have different names and that the different sound outputs are split up in the settings. (Some of the suggestions I gave here like vfx did not have an influence on my rating, I just really liked the game and wanted to give some suggestions, if you wanted to continue the game)