Space Pi Defense is a mouse-accuracy base defense game in the browser: click and drag to draw lines that stop enemy rays, grow your base to the target radius across 13 levels, collect coins for upgrades, and grab timed powerups. About ~60 KB after Play, no install, no account.
Prefer a twin-stick space shooter instead? Try Orbital Radius Shooter.
js13k SpacePi by Jack Rugile (MIT). Draw defensive lines, grow the base, spend coins on upgrades across 13 levels. About ~60 KB downloads once from this site when you press Play. Progress stays in your browser.
Click-drag to draw lines (power limited). Space pauses. A mouse or trackpad works best; canvas is 960x600.
Welcome - press Play to load Space Pi Defense. Progress saves in this browser under ftol:spacepidefense:user.
Frequently Asked Questions
What does Space Pi Defense do?
It is a mouse-accuracy defense game: draw lines to stop enemy rays, grow your base to a target radius across 13 levels, spend coins on upgrades, and use timed powerups. Lower scores are better.
Does it work on a phone?
The page loads on a phone, but drawing lines needs a pointer. A desktop mouse or trackpad is the practical way to play the 960x600 canvas.
Is anything saved in my browser?
Yes. Level progress, upgrades, funds, and overall stats use localStorage key ftol:spacepidefense:user. Reset Game Data clears it. Nothing is uploaded.
How big is the download?
About ~60 KB of HTML/CSS/JS after you press Play. The browser caches it for later visits on the same device.
How do I play?
Press Play, then Play Game in the engine menu. Click-drag to draw defensive lines (limited by power). Space pauses. Beat levels, spend coins on upgrades, then climb all 13 bases.
Is this open source?
Yes. It is adapted from SpacePi by Jack Rugile for js13kGames under the MIT license (jackrugile/spacepi-js13k). This site build ships LICENSE and CREDITS.