Nice
I played the original and I liked the game to begin with. To be honest, a lot of the changes you made I didn't really notice. I don't mean that you did a bad job on this cause I don't think you did, it's just that I guess I didn't have any problems with lag and other back end things. Also, I didn't play easy mode on the first so I can't exactly tell what bug you fixed or what the previous music was.
Even though you made some changes since I wasn't really affected by anything the game hasn't changed much for me so the scores will remain almost the same. I can't give you a 4.5/5 but I can give you a 9/10.
Nice job on this, you should be proud of yourself, I don't think the score really reflects its value, it's a solid game. I believe it deserves to be somewhere arounds 3.50 - 4.00 but I can't really change that.