As you can see, in each other down solution your plans have been thwarted! (3,4,2,2)
I believe the answer is:
the game is up
'see in each other down solution your plans have been thwarted' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'as you' is the wordplay.
I cannot quite understand how this works, but
'as' could be 'eg' (both can introduce an example) and 'eg' is present in the answer.
'you' could be 'u' (commonly used in online communication) and 'u' is found in the answer.
This explanation may well be incorrect...
'can' acts as a link.
Can you help me to learn more?
(Other definitions for the game is up that I've seen before include "The deception's revealed" , "One's crime is revealed" , "Plan or crime is revealed or foiled" , "The beaters have done their work" , "Springer's been active" .)