Intresting take one the theme !
I found a balance where I spammed the left choice of emails, then spammed that coffee delivery to crank up my cafeine rate to be ready for a new batch of mails x3
I don't know if it is intentional, but I tried to ignore the popups as a good computer user should do, and my game was lagging and I couldn't use emails so I failed xD
Nice one ! Congrats !