diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c5ab9ea
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+steel
+steel.exe
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..986f6df
--- /dev/null
+++ b/README.md
@@ -0,0 +1,14 @@
+# How to build
+On linux: 
+
+```
+go build -tags enableEbiten
+```
+
+On windows:
+
+```
+$env:CGO_ENABLED=0
+go build -tags enableEbiten
+```
+
diff --git a/steel b/steel
deleted file mode 100755
index a07a6f6..0000000
Binary files a/steel and /dev/null differ
diff --git a/steel.exe b/steel.exe
deleted file mode 100644
index 0161a19..0000000
Binary files a/steel.exe and /dev/null differ