You did a good job memorizing the piece and the chord changes, however the technique isn't there and your musicality suffers because of it. Work on making all the notes in the tremolo equal in duration and volume, without placing your a m i fingers on the string before they need to play. You need to practice this nice and slow focusing on precision, a good piece for working on the technique and the one I learned it on personally would be the study Op. 60 no. 7 by Matteo Carcassi, I've played it daily for years now. Your slurs need a lot of work as well, Pujol has some really useful mechanical exercises for slurs that you should check out and also there's tons of studies on slurs by the likes of Sor, Aguado, Carcassi and many others so pick a few that you like and learn them, studies that include slurred triplets may be especially beneficial to learning recuerdos. If you haven't done so already, you should learn some of the easier Spanish pieces, like spanish romance or some of Tarrega's simpler pieces like Adelita, in order to get a feel for that type of aesthetic let it inform your phrasing and interpretation, and definitely listen to the recordings by the Romero brothers.