Thanks! :D
You can edit notes by clicking on the map, clicking on a room with a note, clicking the note that shows up in the bottom right and then rewritting it.
You need to make item drops, either by destroying the pink star blocks, or by reaching 50 & 100 combos. Each white stars that appears guarantees a drop, though you won't know what it is until after the fight. Also, Saen' Liz drops fire gems commonly ;)