Okay, I think I have a good compromise between the new name and old one. How about... I forgot the new name for a moment. (That's not a good sign.)
Okay, how about... Man, I had it for a moment, but forgot it again!
Let me just- Right! "AfterBeat"! That's the current name!
Okay, now that I remember it, let me suggest "AfterBeat: Arrhythmia". It has the easier-to-spell title, while still having the word that made the better one stand out!
Seriously, it's not a good sign I forgot the current title twice in a row. I'm being honest about that, too! At least this game taught me to look for more interesting titles for my own stuff, using words that you don't see everyday.
Anyway, I know you won't take any criticism, because the people who've already purchased your game haven't been that vocal, so I will leave now.