

The following Upgrades will be added to the shop:
Upgrade reduces damage from enemy and physics hits
Upgrade reduces the speed at which the overcharge meter fills up
Each upgrade increases resistance and value of objects, separately
Increases the amount of valuables in the next level
Upgrade makes the player valuable; default roughly $11 per HP remaining scaling up with level
Upgrade gradually restores player's health, starting at 1 hp/second
Revives a player once per upgraded level. Upgrade levels are lost on reviving!
Each level adds a new inventory slot, up to maximum of 9 slots (configurable)