I understand your perspective, but the fee is so low (less than $4 USD) and will include all future updates and ports of the game to other platforms, including an upcoming native Linux version. I think the price is fair.
Up to you, it's your project. But I guess you will not get much feedback that way. Maybe I will buy when it is finished.
🙄
It may interest you to know that I just released beta 2, which includes a free downloadable demo version.