Aftering considering the advice from community, we decided to make it almost free(0.99 dollar), and we are waiting for steam to accept the price.
For someone who has not bought the game, we hope you to add it to your wishlist and download it later.
For someone who has bought the game, we will do some compensation which is under discuss.
We hope you to support this game as a prerelease demo, and then we will add more levels and gameplay elements later if you like it.