The game you will receive will be labeled as beta because the one thing it is missing is your valuable feedback. You will get the option to tell me what you like about the game, what you didn't like, and I will aggregate everyone's opinion and make some (few) tweaks.
The game you get will be at the quality and level I think it deserves. But I will still take your input to tweak the game a bit.
If you buy the beta, you do not need to purchase a full copy. Purchasing the beta will cover all updates/improvements I put into the game.