Nice one! I usually use my left hand for games though, so I had to use wasd with my right hand. I occasionally clicked upgrades by accident, but I guess that added to the fun.
I decided to stop after a little while to keep the Gif small enough.
My time was about 30 seconds from touching the blue at the start to leaving the blue at the end.
Here is a png and a gif of my run:
(They are the same run. Itch only lets me upload images up to 3MiB, so I wasn't able to fit as many frames per second into the png, and the gif doesn't look as good for me.)
The timing seems to be when the line on the left is completely clear, but a ball is over the line on the right.
Also, you have to zoom to see the score.
For my submission, Itch let me set the dimensions of the HTML view, so I set them to be the same as what was under Project -> Project Settings -> Display -> Window -> Size in Godot 3.