D3 Heat Map --Feedback!

Hi everyone, I just completed my 3rd d3 project called “Heat Map”,
I will like you to check it out and tell me what you think about it.

https://codepen.io/SammyChris/full/dLrMvY?editors=0010

Looks pretty good!

Only thing I see is that tooltip feels its too far away from mouse cursor.

:clap:

Thanks so much, I have corrected the issue.