As well as the others, I have no intention on putting you down, please read this with an open mind.
Honestly, I'm not positive if their reply was serious or not. Further notice will confirm that, if any notice is indeed handed out. Like Butt monkey stated, the e-mail does in fact seem rather casual, short, and unprofessional for such an official company. Other Indie designers have gotten rejected with their work in other, larger, more detailed projects. Now, continuing with a few other points:
Have you reviewed and actually thought about their license, the agreements you must note, how Blitz will publish your game, and how people will think of your game? It seems you are in a huge rush to publish a game that (I am not saying it's bad) is not quite as detailed as other indie games. Even if you wanted to hope for them to agree to publishing your game, you would mandatorally have to improve on your spelling and grammar, as well as provide more depth for the publishing company you are contacting. Another oddity is that your game is unfinished, yet you still wanted to get it published. Have you thought about how Blitz will ship packages of your game which you haven't even requested, thought of, or even designed all over the world? They will not pack it for you, neither will they ship it all over the world.
Moreover, thinking about how much work should be put towards the game is also very necessary even for indie video games. Have you put all the effort you can afford and time into the video game? Have you considered how users will want to play it? And so on.
Additionally, media you may have used have licenses. If you do not adhere towards these agreements, you will get into a lot of financial trouble. For instance, if a license states that you cannot use the media in a commercial game with or without permission, and you continue to pursue publishing your game commercially with this media, you could get into court very quickly.
Another small point is that you don't even have a firm, professional, fully hosted website with relative information for them to look into.
You may want to revise this big strategy before you consider e-mailing a professional hosting company again.
An edit: Apparently you are underaged anyways. If you cannot post your age without the AUP interfering, it is obvious you are under the age of 18, the legal age of an adult. Thus, you must have a legal parent or gaurdian conference with the company you wish to publish through. You won't be able to do it with your age...
