Angry Birds (NES, 2013)
Also known as: Super Angry Birds
This game has unused graphics.
Angry Birds is a surprisingly good bootleg NES port of the homebrew Sega Genesis demake of the mobile phone game. Rare for an NES game, nearly all of the audio (the sole exception being the sound for selecting menu items) is stored as DPCM samples, all taken from the original game. The physics are slightly off, but this game definitely blows the low-quality Nice Code port out of the water.
Buttons used on the end of level screen shown after losing and winning in the original game. This version scraps the end of level screen in favor of writing "WIN" or "LOSE" across the screen in white 8×8 tiles, likely to save space.
Can you use the blue bird with some hacking?
Strangely, the blue bird is the only character that isn't used in any level whatsoever.