System of Equations

Protect your system from hackers and try to save your connection.

Place +'s to diminish the hacker values while avoiding dropped -'s to protect your own.
Pickup *'s to double your value or %'s to try your luck for an increased value.
Find the right door to move through the system and stop more hackers

Arrow Keys - Move / Execute Action
Hold X + Arrow - Place + at last position
Hold Z + Arrow - Place + adjacent to position