These games are hardly even games.
I'm not trying to be mean, there's obviously a lot of effort put into this and I recognize that, but there just isn't any gameplay here. You basically hold right while your car bounces over randomly generated terrain. Yes, it's possible to control your car somewhat more, but there's little point to it.
I don't find this game or the one preceeding it fun at all, and I'm just mystified by these games where effort has been put into style, polish and debugging but gameplay is nearly absent. A lot more is needed here to make the player feel that they are interacting and playing a game.