I honestly loved the concept. The game left much to be desired, but I assume that it is largely unfinished. I still found myself grinding so I can beat the final boss, but felt like there was no goal other than completion sake. I don't know what you are deciding on in the future, but here are just a few suggestions.
-More battles. If you have Twilight and Fluttershy, you should include the other 3 as well. I haven't read the fic the game is based off of, but if you could make this possible, it would add a lot of playtime.
-Possibly more to do with Dashie. It seemed like a Tamagotchi like game at first, with her roaming about. Maybe add some interactions on there.
-More story scenes. I'm sure you got a few more planned, but if you could flush out the player's connection with Dashie a bit more, it would make whatever finale you have planned that more emotional. I can tell that you are going for that personal connection, so this would be a huge plus.
-Certain parts of the scenery is very low quality. If you drew the segment after the story scene with Twilight, then you have quite a knack for art. I'd prefer to see more of your art than a large and grainy picture backdrop.
-Music seems a bit out of place. You should look around for some better choices for your battle themes. The heavy remix of the Sonic 2 boss that you use is very unfitting for a fight against Luna. See if you can use the Nightmare Night instrumental song composed by Wooden Toaster. I'm sure he wouldn't mind if you asked for permission, and it would fit the scenario a lot better. Same goes for the rest of the battle themes.
I hope you put a bit more effort into this by the time it's finished. Don't take this harshly, because I honestly enjoyed what you had. I'm giving you the benefit of the doubt that you will evolve this into a wonderful game. I also just wanted to offer you those suggestions for the sake of feedback. You can choose to use it if you want. As I said, I really want this to be recognized for what it has, because it has a ton of potential. I wish you luck in finishing this up, and I'll be keeping an eye on it. In the meantime, I'll just let my heart melt while Dashie says she loves me.