diff --git a/.gitignore b/.gitignore
index a5c2d2d..2467a3c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 .vs/
 out/
-*.json
\ No newline at end of file
+build/
+*.json
diff --git a/NES Emulator/controller.c b/NES Emulator/controller.c
index 57e05b2..3a7e742 100644
--- a/NES Emulator/controller.c	
+++ b/NES Emulator/controller.c	
@@ -15,7 +15,7 @@ Byte pollInput(struct Controller* controller)
 
 void fillRegister(struct Controller* controller)
 {
-	Byte* keyboard = SDL_GetKeyboardState(NULL);
+	const Byte* keyboard = SDL_GetKeyboardState(NULL);
 
 	controller->data.A = keyboard[SDL_SCANCODE_A];
 	controller->data.B = keyboard[SDL_SCANCODE_S];
diff --git a/README.md b/README.md
index d0323ec..3d57b2c 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,5 @@
-# NESEmulator
-A custom built NES emulator
+# NESEmulator [![CI](https://github.com/Lauchmelder23/NESEmulator/actions/workflows/ci.yml/badge.svg)](https://github.com/Lauchmelder23/NESEmulator/actions/workflows/ci.yml)
+
+A very basic, cross-platform implementation of a classic NES Emulator.
+
+I try to mimic the actual machines behaviour as closely as possible, striving for cycle accuracy as well as maintaining a lot of the quirks the original NES had.