Danny Limanseta shares a playable Three.js parcel delivery game built mainly with Sonnet

• Night Courier is a desktop-browser delivery game built mainly with Sonnet and Three.js, according to the creator's announcement and his playable-build follow-up.
• The 3D models were built in code by Sonnet; sound effects came from a purchased library.
• Sonnet became the default because Limanseta finds Opus only marginally better, but slower and much more expensive, as he explains in a reply.

A delivery can revolve around a fly named Clive in Night Courier, which lists more than 100 standalone parcel stories. Product designer Danny Limanseta also had Sonnet make the gameplay trailer.

Players ride a scooter through six districts of Fogport as a tuxedo-cat courier for Meow Express, according to the current game listing. The city takes its inspiration from 1990s Hong Kong.

Customers sometimes invite the courier into four mini-games:

• Mahjong match-3
• A claw machine
• Karaoke
• Catching flies with chopsticks

A live parcel camera tracks cargo, and bumpy riding damages it, according to the game description. Fragile parcels can cost tips, a pleasingly fussy detail in a chill driving game.

Every 3D model in the game was made in code by Sonnet 5.5, Limanseta said in a reply. He rates Opus as marginally better, but says its slower speed and higher cost keep him on Sonnet for most of this project.

The trailer needed repeated direction: Limanseta said he had to direct Sonnet “multiple times to make it better.”

Limanseta bought a sound-effects library, then asked the model to find sounds within it.

Limanseta estimates that making one game with Sonnet 5.5 takes about 20% of his weekly allowance on Claude Code's Max 20x plan. He works on multiple games simultaneously to make use of that capacity.

Anthropic's official plan table lists Max 20x at $200 a month.

Night Courier is free to play on Wavedash, with the creator's follow-up specifying desktop browsers only. Limanseta chose Wavedash because he considers it friendlier to AI games.

The playable build hasn't been optimized yet. In another reply, he acknowledged that some shaders appeared to be failing and said he'd check.

He says he's making these games for fun and isn't focused on “productizing” them.

Limanseta also launched Treetop Tales, a treehouse sandbox he describes in his launch thread:

• Place a block; rope bridges, slides and rocket ships appear automatically.
• Find 119 secrets, from pirate ships to paddling pools with rubber ducks.
• Watch sunset bring lanterns, fireflies and an aurora.
• Play free on desktop or phone, with no timers or goals. Limanseta recommends desktop.

Treetop Tales block-placement demo

Following a player's suggestion, he is also considering first-person exploration of the treehouse.