This was a pretty unique game! I was really thankful you had a red mark dictating the collision spot because trying to avoid shots around the sprite entirely seemed IMPOSSIBLE for me haha. After a couple of tries, I think this is the best I could come up with. No clue if it's good or not, but it was the best I could do. 
I thought the concept of wanting to kill enemies by getting above them, but earning less points the higher you go was an interesting contradiction. I'm honestly still unsure about the best strategy for getting the high score, but that's what kinda got me intrigued about all this 😅 Fun challenge!
If you get the chance, please feel free to check out our game, as well! Thanks!🙏