I really liked the little opening cutscene — it was so cute, and the story came across perfectly without a single word! XD
One suggestion: it would be great if turning the reaper felt a bit snappier. For example, when facing east, a single press of the A (south) button could instantly turn the reaper south, instead of needing a longer press. Since there are lots of quick turnarounds in the game, this small tweak could make movement feel smoother!