improve readme

fixes #31

Author: matcool

README.md

@@ -1,2 +1,55 @@
 # Geode Command Line
-Command-line utilities for working w/ geode.
+Command-line utilities for working with [Geode SDK](https://geode-sdk.org).
+
+For more information see its [page on the docs](https://docs.geode-sdk.org/getting-started/geode-cli).
+
+## Usage
+The CLI is typically invoked for you by Geode's build system, but it does have some standalone features:
+
+``` bash
+# Walks you through creating a Geode mod via a template
+geode new
+
+# Runs Geometry Dash from the default profile
+geode run
+
+# Installs the sdk. For more info see the docs
+geode sdk install
+
+# Uploads a mod to the index. For more info see the docs
+geode index mods create
+```
+
+## Installation
+*(For more in depth information see the docs.)*
+
+### Windows (scoop)
+```
+scoop bucket add extras
+scoop install geode-sdk-cli
+```
+
+### Windows (Winget)
+> This may be out of date. Sorry!
+```
+winget install GeodeSDK.GeodeCLI
+```
+
+### MacOS (brew)
+```
+brew install geode-sdk/geode/geode-cli
+```
+
+### Linux
+We provide linux binaries [in every release](https://github.com/geode-sdk/cli/releases/latest).
+
+### Arch Linux (Unoffical AUR package)
+> **Note**: This package is unofficial and not maintained by us. Use at your own risk.
+
+[geode-cli-bin](https://aur.archlinux.org/packages/geode-cli-bin)
+
+### From source
+> **Note**: This require a [local rust installation](https://www.rust-lang.org/tools/install), and can take a very long time
+```
+cargo install --git https://github.com/geode-sdk/cli
+```