Dude I checked out your game and there's three things I'd like to suggest:
1. The save file(game.rxdata) is corrupted so I can't open the game initially. I replaced the save file with my own save file and I was eventually able to play your game. I'm sure most people don't know how to fix a corrupted save file so they may not be able to play your game at all.
2. There's a problem with the setting of your tileset. The player can walk on the top of the roof due to the wrong setting of the priority. The passage setting for pokecenter is kinda wrong as well. I know these are minor mistakes but some people are very sensitive and your game will leave a bad impression on them.
3. Minor issues like the hero/heroine's mother doesn't approach him/her during the first conversation should be fixed as well. I dunno what's wrong with the music and it doesn't always run for some reasons(perhaps my laptop sucks?).
Anyway, nice game so far! Just fix the issues I mentioned above so that more people will be able to play Pkmn Crystal rain.