minor doc tweaks

Author: konsumer

.gitignore

@@ -2,3 +2,4 @@
 .vscode
 build
 *.null0
+*.wasm

README.md

@@ -2,10 +2,17 @@ This is a basic example cart in C for the [null0](https://notnull.games/null0) g
 
 ## usage
 
-Carts run natively, and on the web. This repo will auto-publish to github-pages on push, so users can check out your cart.
+Carts run natively, and on the web. This repo will auto-publish to github-pages on push, so users can check out your cart without installing anything.
 
 They can also install [the native runtime](https://github.com/notnullgames/null0/releases) and use it to run your cart.
 
+## github
+
+There are 2 actions:
+
+- Publish demo to github-pages - this happens on any push
+- Attach current version of your cart to any releases that are created (like [here](https://github.com/notnullgames/cart_c/releases/))
+
 ## developing
 
 Make sure you have [wasi-sdk](https://github.com/WebAssembly/wasi-sdk/releases) installed and `WASI_SDK_PATH` set to it's location (eg `/opt/wasi-sdk`.)
@@ -15,10 +22,11 @@ Then you can do this:
 ```sh
 $WASI_SDK_PATH/bin/clang src/main.c -o src/main.wasm
 cd src
-zip -r ../cart.null0 -x '*.h' '*.c' .
+zip -r ../mygame.null0 . -x '*.h' '*.c'
 ```
 
 You can also use cmake (recommended) to build a complete cart:
+src/
 
 ```sh
 cmake -B build -DCMAKE_TOOLCHAIN_FILE=$WASI_SDK_PATH/share/cmake/wasi-sdk.cmake -DCMAKE_BUILD_TYPE=Release