Halloween Hackathon
Build Spooky Apps with Shakespeare
Create Halloween-themed applications and compete for 87,000 sats each across three prize categories.
Design Excellence
Most visually stunning Halloween design
Functional Innovation
Best technical implementation
Judge's Choice
Overall favorite
Enter the Hackathon
Ready to compete for 87,000 sats in prizes? Submit your spooky Shakespeare creation and it will appear in the submissions below! 👻
Submissions Closed
The Halloween Hackathon submission period has ended. Winners will be announced November 8th! 🎃
Submissions Have Closed
Thank you to everyone who participated! Winners will be announced on November 8th, 2025.
Community Submissions 🕸️
Block Cemetery
Block Cemetery is a real-time Bitcoin explorer built on Nostr, turning every new block into a spooky social event. Watch blocks rise from the fog, share them on Nostr, and chat with other explorers in a haunted digital graveyard. Core Features: • Live Blocks: Watch new Bitcoin blocks appear as glowing tombstones. • Block Details: Click to reveal transactions, miner info, and scary animations. • Mempool Spirits: Unconfirmed transactions float upward, waiting for rebirth. Nostr Integration • Share Blocks (Kind-1): Post new blocks directly to Nostr with gothic previews and hashtags like #bitcoin #blockcemetery. • Cemetery Chat (NIP-28): Real-time group chat for explorers to discuss blocks and Bitcoin’s undead energy. • Witness Notes: Sign and publish “👁️ Witnessed Block” messages to Nostr. • Zaps (NIP-57): Send lightning zaps that trigger thunder and lightning effects on-screen. • Souls Feed: Live stream of all #blockcemetery posts across Nostr. Theme Modes • Calm Mode: Quiet, minimal graveyard view. • Scary Mode: Fog, skulls, and ghostly whispers. • Nightmare Mode: Full horror - blood-red skies, bats, tortured souls, and thunder when a block is mined. Built With React + TypeScript + TailwindCSS Nostr (NIP-01, 28, 57) + mempool.space API Hosted on Shakespeare.diy for the Shakespeare Halloween Hackathon.
Spookstr
Spookstr is a paranormal/cryptid/UFO app that pulls posts from Nostr that run along those lines. Users can see posts from others and make their own posts. In the future Spookstr aims to have its own relay so that Spookstr can become a real community app.
Debt Reaper
A very scary clock with the current US national debt! Because what is more scary and haunting than that!?!? [For sample showcase if you want it].
Halloween Storybook
This is a simple and cute (not very spooky) children's Halloween story about a cat who learns a life lesson at Halloween while also learning about Bitcoin. It's wholesome. [For sample entry, the cat didn't make this and he isn't allowed to have a wallet so he can't win]
Hexed Notes
Put a hex on your notes and let your friends cast spells to remove the hex and decode your secret message.
Haunted Relay Scanner
Wander the haunted forest of Nostr relays. Alive trees glow with activity while possessed ghosts wait to be revealed. Keep the controls within reach and monitor the hunt without losing sight of the action.
Sample: 🎃 Halloween Countdown 🎃
Open a new Halloween badge each day in October!
Ready to Build Something Spooky? 👻
Join our first monthly theme challenge and show what you can create with Shakespeare!