How to Build a Tower Defense Game
Vibe code waves of enemies walking a path while the player places towers, earns coins and survives as long as possible.
About this tutorial
Tower defense is a strategy game about spending. Enemies follow a path, the player places towers along it, and every coin spent is a bet on where the trouble will be.
You will build the path first, then one enemy, then one tower, then waves that get harder. The clever part is the economy: enemies drop coins, towers cost coins, and upgrades cost more. Get those numbers right and the game becomes a puzzle players replay for hours.
What you need
Step by step
- 1
Describe the game
Prompt: build a tower defense game on a grid with a winding path from left to right
- 2
Send one enemy
Add a single enemy that walks the path from start to end
- 3
Add base health
If an enemy reaches the end, the base loses 1 of 10 hearts
- 4
Place a tower
Let the player click an empty grid square to place a tower that costs 50 coins
- 5
Make it shoot
The tower fires at the closest enemy in range and deals damage
- 6
Add health bars
Show a small bar over each enemy so damage is visible
- 7
Pay the player
Each defeated enemy drops 10 coins shown in a counter at the top
- 8
Add waves
Add waves with a short break between them, each wave adding more and tougher enemies
- 9
Add a second tower
Add a slow tower that freezes enemies but does little damage
- 10
Add upgrades
Click a placed tower to upgrade its range or damage for a rising price
- 11
Balance the economy
Play three waves and adjust coin drops or tower prices so choices feel tight but fair
- 12
Publish it
Publish your game and ask friends which wave they died on
Screenshots
Fun facts
How do you build a tower defense game with AI prompts?
Build in this order: path, one enemy, base health, one tower, coins, waves. Each step is a single prompt and a single play test. If you ask for waves and upgrades before a tower can hit anything, you will not know which part is broken when nothing works.
How do you balance towers, enemies and coins?
Start from the first wave and work forward. The player should be able to afford one tower immediately and a second by wave 3. Enemy health should roughly double every five waves while coin income grows more slowly, so players must upgrade rather than just build more.
What makes tower placement interesting?
Corners and long straight stretches create natural good spots, while limited buildable squares force trade offs. If every square is equally good, placement stops being a decision. Add a few premium positions and let players fight over them.
What coding concepts does this teach?
Waypoint movement, distance checks for range, arrays of enemies and towers, timers for waves and firing rates, and a full game economy. It is one of the richest first projects for learning how many small systems combine into one game.
Need help?
My enemies walk off the path, what is going wrong?
Ask the chat to make enemies follow a list of waypoints in order and move toward the next waypoint only when they reach the current one.
Wave 1 is impossible, how do I fix the difficulty curve?
Give the player enough starting coins for two towers, make wave 1 a single slow enemy, and only add new enemy types every third wave.
My towers shoot at enemies that are already dying, is that a bug?
It is called overkill and it is a real design problem. Ask for towers to ignore enemies whose incoming damage will already defeat them.
How do I show the player where they can build?
Ask for buildable squares to highlight green on hover and blocked squares to show red, so the rules are visible without any text.
