Simple answer: no.Music sheets are what you want to use, because they contain much more information than just showing you which notes you need to play in which order. For example time signature, tempo markings, dynamics, etc. etc. etc., which are all not included in synthesia.Once you get used to sheets, nothing else is acceptable anymore.Btw, I think you should play something else than the HR 2 if you haven't yet gotten to the point of using sheet music. I can't say for sure, because I haven't played it myself but henle lists it as level 8, so it's certainly not a beginner piece (I'm just assuming you are one, I could be wrong ofc).
Lol, you misunderstood me horribly:) For the 11 years i've been practicing the piano, sheet music has been the only way i learn music...and i plan to keep it that way. I just thought i could use Synthesia After i've memorized the sheet music, fingering and markings
I think you should just use both, thats what I do. it helps to vizualise difficult or things you don't recognise quickly on paper.
Sight reading might be the best way. But against everything that has been said by everyone around me, I learned hard pieces with synthesia, and tempo markings and pedals and interpretations are easy with ear. I can give a good emotional interpretation of pieces I learn on synthesia.Now if you want to nit pick you can, and it's easier to look at a sheet music than to turn your PC on every time you want to learn a new piece.All in all, I'd recomment you to sight read, but don't let them tell you that the lack of tempo markings or pedalling in synthesia is a drawback, because it's not.