Tom7 implemented some of this with his Learnfun and Playfun (https://www.youtube.com/watch?v=xOCurBYI_gY https://www.youtube.com/watch?v=xOCurBYI_gY) - It looks

Tom7 implemented some of this with his Learnfun and Playfun (https://www.youtube.com/watch?v=xOCurBYI_gY https://www.youtube.com/watch?v=xOCurBYI_gY) - It looks for lexicographical changes to bytes in memory (i.e., one byte seems to almost always increase, and then when it suddenly decrements, a neighboring byte is incremented) as a way of calculating memory location for increasing values (score, x-position), and similarly detects bytes that generally seem to decrease (lives). It then tries to play the game, choosing inputs that increase the values that should be increasing (move right, gain lives), or tries not to decrease the values that are decreasing (don't die).