Here is my review:
Storyline
The storyline contains a few grammatical errors which you should look out for. I won't elaborate more on it. Okay, first thing, after reading just a few sentences, I noticed that you're just re-writing the typical Fr/Lg routine. It might be just me, or others might agree too, but I dislike that. Also, a few characters seemed too casual. For example:
Prof. Oak didn't think and just gave the PokeDex
Try to give Samuel a more former tone, because he has been known since 1998 to be like that. And again, defeating the gyms, elite 4, and stopping Team Rocket is the generic storyline. Try to add more spice and creativity. And for the rest of the storyline, they are fresh and new, so I have no issues with that.
Screenshots
First, like what Shadowraze said, your titlescreen needs work. The background is really messy and the whole titlescreen looks empty. As for the in-game graphics, the grass (GRASS, not BUSH) tiles are the color of puke. Try to include more shades, and fix the coloring. I'd recommend at least 3 shades, and get the palette from somewhere else, because your version isn't looking good. Your house tile looks really messed up too, if you're looking to create a more creative house, insert a new one or at least fix your version. Your mapping seems fine, except that some parts are a little too empty.
OW
Your overworld lacks shades and it seems a bit too big as compared to the other Fr ones.
It's either you change one (your custom one) or you change all. (The original ones).
Overall, I give this a 6/10. You're just in your early stages, so I won't be too strict about the ratings, but I believe your hack has the potential to be FAR better.
