I think the main issue is, you can have 1 thousand of robots inside same square, you just need to go around this by limiting the number of robots inside same square.
This will limit the amount of robots can be over chest and limit the input or output amount.
Side effect of this is, chaos when have ...

The interaction with razor keyboard is cool. But the best is get any connection with an arduino.
Ok, I don't mean suport for arduino, but some port/gate/whateveryouwanttocall that allow get information from de game like, health, shield, speed of player, etc. And even some inputs, like choose weapon ...