I didn’t have any super-uncommon NES games, but everyone has Mario so I skipped ahead to Marble Madness, a fun little race game published by Milton Bradley for NES (with the port evidently handled by Rare), but was originally an arcade game developed for Atari by Mark Cerny (later of Naughty Dog and Insomniac).
One unusual feature was you could set the controls to “45 degree” mode, where you hold the controller at an angle to make isometric navigation easier, as you don’t have to hold diagonals all the time.