Upgrades

Buying a level

The bottle on the panel opens the upgrade window: the current level, the next one, and each requirement with the operator's own message for it, so a player sees what they miss and never a raw string. The buy button runs the next level's requirements, then its rewards. The take verbs in the rewards are the charge, checked whole before any is taken. effects.upgraded runs after.

The shipped ladders charge money and an item for every level, and from level 4 a count of actions the minion did.

Consuming

upgrades {
  consume-minion = false
}

On, a player feeds one minion to another of the same type and level to raise it: /minions consume <eaten> <into>, or the minecart in the upgrade window, which eats the least worked candidate. The whole move is one transaction: the check is made again inside it, the eaten row is deleted and the level is raised together, or neither happens. It ships off because it is a duplication surface in both products that ship it; the key is read on each call.

Related: Types and levels