diff --git a/README.md b/README.md
index 0652e8b19..7d99b1612 100644
--- a/README.md
+++ b/README.md
@@ -103,6 +103,7 @@ In `rv32emu` repository, there are some prebuilt ELF files for testing purpose.
 * `dhrystone.elf` : See [rv8-bench](https://github.com/michaeljclark/rv8-bench)
 * `pi.elf` : See [tests/pi.c](tests/pi.c)
 * `quake.elf` : See [sysprog21/quake-embedded](https://github.com/sysprog21/quake-embedded)
+* `doom.elf` : See [alanjian85/doom_riscv](https://github.com/alanjian85/doom_riscv)
 
 ## Reference
 
diff --git a/build/doom.elf b/build/doom.elf
old mode 100644
new mode 100755
index f85fbb8b6..7894609d2
Binary files a/build/doom.elf and b/build/doom.elf differ
diff --git a/docs/demo.md b/docs/demo.md
index d3a089ae5..75ecc749f 100644
--- a/docs/demo.md
+++ b/docs/demo.md
@@ -9,8 +9,14 @@
 
 ![Doom Gameplay](https://imgur.com/bLc5LG8.gif)
 
-### Limitations
-* The input system is not supported yet
+### Main Key Bindings (All key bindings are listed in the "READ THIS!" menu)
+* Move Forward/Backward: Up Arrow Key/Down Arrow Key
+* Move Left/Right: Comma(,) Key/Period(.) Key
+* Turn Left/Right: Left Arrow Key/Right Arrow Key
+* Shoot: Left Mouse Button or CTRL Key
+* Sprint: Shift Key
+* 1: Fist
+* 3: Shotgun
 
 ## Quake
 **source**: [quake-embedded](https://github.com/sysprog21/quake-embedded/)