Thank you Sir, i have been looking at C64. My NES assets could quite easily work i think(multicolour), if what i read is correct though, C64 sprites must be 24px (w) and 21 px (h) only? and im looking researching the backgrounds and how its all stored in RAM. so i could modify, or create something new that fit that limitation, and use a C64 colour palette. Once i understand it a little better. :)