Here is a hack for Arkanoid which changes all the color in the game to a red & white palette, giving it an extra challenge of not being able to determine block color.
The red and white theme parodies the Nippon TV logo.
Arkanoid (USA).nes - NOINTRO
CRC32: EE93A28C
MD5: 6A2BFA3C6E9B1CE1E21AABD0DFBF2779
SHA-1: B2B30C4F30DD853C215C17B0C67CFE63D61A3062
SHA-256: 93A46EF4B06AE30682D3CC19CE4B77DA7F98F0DDAF9A3280325A347B5CBBF811