diff --git a/README.md b/README.md
index 18d0175..a3318ff 100644
--- a/README.md
+++ b/README.md
@@ -2,4 +2,18 @@
 
 Just another implementation of a NES emulator written in Rust.
 
-This is an exploratory coding project with the aim to understand concepts of assembler emulation. If you are looking for a cycle-accurate ready-to-use NES emulator, you should probably not use this one.
+**A note of warning:** This is an exploratory coding project with the aim to understand concepts of assembler and emulation in general. If you are looking for a cycle-accurate ready-to-use NES emulator to play some games, this is the wrong one. 
+
+## what works
+* CPU
+* Reading Roms (iNES) 
+* Memory mapping and RAM
+* A very simplistic debugger
+
+## what does not work
+* GPU / graphics
+* APU / sound
+* Controllers
+* a lot of mappers
+* game saves
+* everything else