You will probably get a little bit of flame from people due to the whole "12 year old" thing, but ignore them. I am not one to judge something or someone based on little things like that.
As to whether I would buy it? Well it really does depend on how well it is coded and polished and of course what it is actually like.
That being said, what sort of ideas did you have? Were you planning on making say, a procedurally generating RPG world? IE. An action RPG (zelda) where the world randomly generates (minecraft)?
If it is something along those lines then yes, I am curious.
PS. 25cents sounds a tad too cheap. I understand that is only the "map explorer" but when you come up to alpha stages you may very well want to go up to at least $5.99 or $9.99. You may at some stage need to hire a 3rd party for soundtracks or something else unforeseen and that extra money will be useful then.
Once you get an alpha up, you might want to check out Desura as a distribution platform (assuming you want one). They fully support indie development (that is the majority of their market) and have recently opted for a minecraft-style alpha funding.
