diff --git a/README.md b/README.md
index f8253fe..21b1b69 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,12 @@
 
 import tile sheets into Bitsy games.
 
+## about
+
+© Max Bradbury 2020. released under the MIT license. 
+uses my own [bitsy-parser](https://crates.io/crates/bitsy-parser) library 
+and the delightful [wasm-pack](https://crates.io/crates/wasm-pack).
+
 ## usage
 
 you will need an image, and optionally, a Bitsy game to add your tiles to. 
@@ -37,3 +43,10 @@ it is not the same thing and will not parse correctly.
 * draw your own tile sheet in your favourite paint program e.g. [Aseprite](https://dacap.itch.io/aseprite)
 * "borrow" tiles from an existing game that uses 8×8 tiles, for example any NES or Gameboy game
 * import an unusual image and see what kind of game you can make with the resulting tiles
+
+## help
+
+this tool requires Javascript and WebAssembly, and may not work in all browsers.
+
+if you encounter any issues, please [email me](mailto:max@tinybird.info) 
+with a good description of the problem and (if applicable) any errors in your browser's console.