Please add an auto/mass activate option!! Thousands of charges will take forever to manually activate... Also Mr. Iron needs auto Upgrade. Some ability to pick items he will automaticly consume.
Holding down on the button like the next wave button should fit with the current user interface.
Maybe the same can work for Mr. Iron. After he upgrades, he equips the same items and tries again. This isn't a smart auto-upgrade, but it would be a repeat upgrade that should be a huge improvement.
