this is an early access build. the full game will be free on steam, and plus the money is used to support the development. just wait until the 17th to play the full game.
That's the point, he's charging $15 to support the development of a game made in paint, there is no need to support the development, he's just taking your money under the guise of 'support' the most he'd need is like $5.
Ok bro then try remaking this game in 10 minutes with AI and ALL of the features in the full version. This dev spent a year making this game mostly by himself and you're trashing on it.