The source code is very readable, and contains all answers in lz-in-base64-encoded JSON. It should be easy to add support for playing previous/future rounds using URL parameters and/or buttons with a userscript.

Edit: it's been compiled with Angular.js, and I don't want to install the IDE to change 8 lines... So I identified the function in the minified version and altered it. When I tell my browser to replace the file with a local copy, the hack works until I load another URL. I'll try to figure out how to keep it pointed to the hacked version (which reads the ?num= URL parameter instead of calculating number of days since the first one) but making a Redirector rule fails because of unexpected content type reported by GitHub (text/plain). I don't want to run my own server, let's see if I can do it another way...

Edit: Done

Dig it! thanks for this

Love this game, got in 5 guesses

What a cool idea! I got it in 1, but I knew the landmark haha. Looking forward to tomorrow!

I added an "archive" function where you can play previous and following games: https://chaoticneutralczech.github.io/SatleArchiveHack/

🛰Satle #102 5/6
🟥🟥🟥🟥🟩⬜
https://satle.ca

That's pretty cool! Unfortunately my best guess was 6000Km away

🛰Satle #101 3/6 🟥🟥🟩⬜⬜⬜
https://satle.ca

🛰Satle #101 3/6
🟥🟥🟩⬜⬜⬜
https://satle.ca

🛰Satle #101 2/6 🟥🟩⬜⬜⬜⬜ https://satle.ca