Cubegrass’s block trainer source code

[Vim]

Hi,
I’m using Cubegrass’s block trainer (https://cubegrass.appspot.com/block_trainer/), and I wondered if the source code is available somewhere.
I know you can get the html and javascript files, but it uses a php script (get_block.php) which can’t be downloaded (as far as I tried).
Does anyone have access to its source? Or at least, how to contact the creator?
Thanks in advance!

 

[Mnts]

The site recently wen't down as the server returns 500 error. Would love to contact the owner or get the source code as well.

 

[qwr]

The site is up for me but forever stuck on loading.

Instead of looking at the source, here is an opportunity for you to write your own

 

[abunickabhi]

The cubegrass website is active now,

I am using it after 9 years, I used to use it actively in 2016 when I switched to Roux from CFOP.

https://cubegrass.appspot.com/block_trainer/