Can Operations be attacked in Pixel Tactics?
You cannot attack Operations. They are not part of your unit and only reside in one of 3 reserve slots which hold only Traps or Operations. Neither can be directly attacked as they have no attack or health.

On the other hand, some cards can increase or decrease the amount of timers on various Operations. In this way, you can lengthen or reduce the time an Operation is in play even though it cannot be removed directly.