I think the idea of cleaning up graffiti is really original and creatively done!
What I also love is how, once the graffiti is cleaned, it explodes into the colors the graffiti originally had: That’s such a nice touch. The retro music fits the pixel art style really well and makes the whole thing feel complete. Having a high score tracker is always a fun addition :)
And the fact that you made this in an engine not many people choose: that’s super cool in itself. Well done!