Ahh I just finished Ace's route and it was absolutely amazing!
To begin, this was a really wonderful game. I wasn't surprised by the twist but had lots of fun nonetheless! I really love Ace's jokes/teasing and his tendency to call Ariel by a nickname. Princess was very cute but when he called her doll (my favorite nickname(?)) for a brief moment I almost squealed hehe xD He was the perfect mix of charming and respectful! :> The voice actor for him also did a really wonderful job. The line where he says he's fallen for her was so sweet and well done.
In terms of critique, I think the ending/ final battle felt a little rushed, but that's understandable considering the game had to be finished under a time limit. The beginning was very strong though, and Ariel's interaction with Ace interested me enough to pursue his route even though she's known Michael longer and he seems like the most logical choice, so wonderful job on building his character :D