The game itself reminds me very much of the classic 8-bit arcade hall or home console games - the blocky fonts, the limited set of colours, the music... Also nice to see you make a point of using non-conventional drawing methods to build up the screen. Having no pretentious storyline helps too.
I haven't played it very far (the controls take some time to get used to), so I'll have to see how it progresses. The replay value may be a little low if there is not much more progress in there than the increasing speed. For a retro gamer it might work but I'm not sure about today's audience.
To avoid that, you could include the external files with the game executable and have them extracted at runtime (Global Game Settings -> Include tab). It is best to extract them to the game's temporary directory (Vista may not allow extraction where the game is) but you'll have to edit the initialisation script to make sure the game finds the DLL.
In order to play the music format, I have utilized Smarty's brand-new GM BASSMOD. This means that you will now have to unzip the WinZip directories before playing (sorry).