I think this game has potential. That said, it reminds me of a few other games I've played in this jam with a similar visual style and core idea.
What I do like is the chain-kill concept and the focus on getting higher scores. However, I couldn't really figure out how to consistently trigger chain kills, so that part didn't feel very satisfying to me.
With some extra polish and a few gameplay improvements, I think this could turn into a really fun and satisfying game. Good luck with the project!