My first impression of the anime was not good, as I'm personally not a fan of CGI. However, all the old-school videogame references immediately made me fell for it and give it a chance, as I am a gamer myself.
I didn't start watching it expecting it to be a romance anime and maybe that was the reason I liked it more. As the anime develops and the characters start getting closer and knowing each other, one realizes that this is not the typical love story, but more of an innocent, childish friendship between two kids that share a common passion.
Even though I admit it's not the best anime out there, I will recommend it 100% if you ever had similiar experiences as a kid. I guarantee that you'll enjoy it a lot and cherish the main characters as much as I did.