Thanks for asking about this and the translation.

I used both Google and DeepL to translate this and neither did it correctly. 

DeepL:

"Then, you throw a stone on Monday's square and with your foot, you have to push the stone through the squares in order without falling to the ground."

Google:

"Then, you throw a stone in Monday's square and with your foot and leg, you have to push the stone through the squares in order without falling to the ground."

Looking up each word using SpanishDictionary.com was a surprise 😬 but didn't get me any closer to the correct translation.