You can download the P8 cart file from the PICO-8 site, that's probably the easiest way. And it's free!
Get it here: https://www.lexaloffle.com/bbs/?tid=51434 or maybe just saving the cart image will work:
It's a multicart game with the title screen which is why I didn't include them in the download.
You can also search in Splore on your handheld or by using the PICO8 commandline, just type: LOAD #DONTDIG
Thanks for playing and glad you're enjoying the game. Cheers!