"Vampire Survivors clone" was our own theme. I'm glad we were able to build it up enough for you to notice it.
It may be hard to beat Hamlet because there are so many unadjusted parts. Sorry.
It is made in Unity. The leaderboard is a sample made by naichi.
It is in Japanese, so it may be hard to refer to, but the link is below.
https://blog.naichilab.com/entry/webgl-simple-ranking