Hi there!
I just wanted to let you know that the full game is available in ROM format as a free download.
The price of the game on sale is to cover the manufacture of what is essentially a collector's item, complete with high-quality hand-controller overlays, cartridge with custom label, and full colour glossy manual; all packaged in a beautiful retro-style "gate-fold" box, like in the old Mattel days.
I understand if you feel the price is too high, but I recommend you at least download the ROM and play the game. It is a lot of fun and very addicting.
By the way, I am the game programmer. So feel free to ask me any questions regarding the game.
-dZ.