Tower Up - Idle Tower Defense

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About the project

In Tower Up, you’ll upgrade powerful towers to stop waves of invading enemies in this incremental idle adventure. It’s designed to deliver satisfying progression — whether you’re playing actively or letting your towers handle the action.

What it does

Provides waves of fun with or without friends!

Start by targeting chickens to start shooting
Earn gold to upgrade your towers and call more minions
Beat the bosses to earn ranks and titles!
Play together to be stronger!

How we built it

I used Meta Horizon World's Desktop Editor.

The environment: Built entirely with the Horizon AI tool and Horizon assets library
NPCs: Horizon assets
Towers: Assets I own or made with blender or the AI tool
Sounds: Horizon library mostly, a few I own and a few made with the AI tool
Scripts: Written from scratch with some AI-assisted snippets and online tutorials/documentation

Challenges we ran into

Balancing the difficulty and the economy for smooth progression, not only as an incremental game but as a multiplayer incremental game
Optimizing UI performance
Handling UI visibility per player
Designing a gameplay experience that doesn’t rely on player avatars

Accomplishments that we're proud of

The feeling is exactly what I was looking for
The game is simple and you get playing almost instantly

What we learned

A lot about creating and optimizing custom UI within Horizon Worlds

What's next for Tower Up - Idle Tower Defense

More endgame content
A global ranking based on total gold earned
Custom tower skins in the in-game shop
Some UI elements are made without UI elements which makes them not fit in some tablet screen, so moving this to proper UI