I struggled to play this game because my keyboard is split between 5 and 6 T-T
I couldn't even use my keypad for input to know what it would have played like on a 3310... I can't help but wonder what it would be like if the controls were more in line with the Nokia...
I think the lack of any sort of backing made it difficult to orient myself too. Like a metronome or some other sort of backing track beyond just the visual feedback.
Overall though I would say it was well executed and has a lot of features, it's an impressive implementation!
Cute touches too like the exit screen, I loved that lol.