Amazing game! I was afraid the boss was gonna be too hard and I ended up over-grinding lol. My only complaint is that the font is kinda hard to read, and I get 0's and 8's mixed up. Other than that I loved it. The visual polish and attention to detail in this thing are simply amazing, and the songs were just banger after banger. Simply great!
EDIT: I beat the game, as in, I threw the giant apple lol, but I noticed the "beat the game" achievement didn't trigger on NG, along with the "reach floor 40" and 50, I had this issue in my game and I solved it by every once in a while triggering the "submit medal" request for every achievement the player had unlocked, say, whenever the game saved, this requires that you keep track of achievements in-game though, and I don't know if you are doing that currently.