The line art looks pretty good, aside from a little bit of sketchiness - sometimes the sketchy lines get in the way of the aesthetic appeal of the drawing, and sometimes they don't. The background also looks a bit odd from a perspective standpoint, like it's too tilted upwards, but I'm not entirely sure how I'd recommend you solve that. I'd also like it if the particle effects around the hearts stood out from the background a little bit more. Other than that, nice work!