The whole "i have an opinion, you have an opinion" thing is cute, but I don't think you can quantify the value of a game just based on the number of levels included. There's plenty of games that have greater value than other games that have more content. You lack any substantial reasons to describe why "4 is just not enough".
Why can't I "quantify the value of a game just based on the number of levels included". I think this game is not worth 10 dollars because after playing each one of the 4 levels three or four times I got bored and moved on to the next game I had to play. If there were more levels I would have spent more time playing the game. Should I just give up and agree with you, is that the only resolution I am allowed here?