Structures:
Trebuchet: Upgrades from the Turret at age 10. Less costly (wood 50 and stone 5)and projectiles can go above anything with more damage(50 damage), but you have to supply it with stone(25 stone for 1 projectile) or else it won't fire. Building cap: 2
Homing Turret: Upgrades from the Turret at age 10. More costly (wood 350 and stone 400) but projectiles hit much harder(50 damage) and homes in on enemies. Building cap: 2
Evolved A.I. Turret: Upgrades from the Turret at age 10. Same downsides as the Homing Turret, but instead of homing in on enemies with harder hits, it attacks enemies with the emperor(emp) hat on, with more damage the more damage it has taken(each 1/5 health taken away adds 10 damage).
Controlled Teleporter: Upgrades from the Teleporter at age 10. When both teleporters are down, they teleport the teleported to the other one. In sandbox, they are shown to be linked by their middle color. Requires 75 wood and stone. Building cap: 2
Shooting Spikes: Upgrades from the Spinning Spikes at age 12. Shoots projectiles periodically at the nearest enemy. Costs 30 wood and 30 stone.
Explosives: Upgrades from the Poison Spikes at age 12. Explodes any enemy that collides with this. Costs 45 wood and 45 stone.
Weapons:
Shotgun: Upgrades from the Musket at age 10. As expected before, it acts like a spread shot. Each bullet deals 35 damage with no bonuses. Each shot requires 20 stone, and it acts like the musket if the user right clicks or if the user only has 10 to 19 stone left, with the regular 50 damage. Cooldown: 5 seconds.
Taser: Upgrades from any of the bows at age 10(repeater), 11(crossbow), or 12(hunting bow). Shoots a no-damaging projectile that stuns the person hit for 5 seconds. Hold left click to charge up how much longer the victim will be stunned and how much damage the victim will take when hit, with 2.5 damage and 1.25 more seconds with each second it is charged, with the max being 50 damage and 30 seconds when charged at 20 seconds. Cooldown: How long you charged up your taser or 10 seconds, whichever's longer.
War Axe: Upgrades from the Great Axe at age 11 and the Hand Axe at age 12. Obtains 9 more resources than the base amount of resources earned by collecting from it. Deals 45 damage and can attack again when the swing animation ends.
Boomerang: Upgrades from the Hunting Bow at age 12. Requires 20 wood, but does not use up it. Throws a boomerang that goes in a looplike shape before returning to it's owner. Deals 40 damage.
Finish Him!: Non-hackers nearby hackers with the Shame! hat have their primary weapon be replaced by this. Disconnects hacker victims. Lasts 30 seconds. Attacks as fast as the daggers. To give you an idea on how this would look like, it's code name is "mega_katana".
Food:
Cake: Upgrades from the Cookie at age 11 and the Cheese Wheel at age 10. Costs 40 food, and functions exactly like the cookie...except for the fact that it also is thrown as a projectile that covers the victim's screen.
Suggest more suggestions in the comments.