Now I'll be brutally honest through this review. I'm doing this on the off chance that you actually read through your comments from time to time. I will start off by saying I'm NOT an animator nor am I a game designer, I am an average joe, a gamer, and I am just the voice of opinion on the matter of your game.
It's good. Well, the idea of it is good. At times the game could be good as well, and I'll admit; it was VERY addicting to play, though I can't seem to manage to make it even a quarter of the way into the game. That being said though, this game felt like it was mixing between a runner and just a straight up artistic game meant for some sort of hidden meaning.
Both variables fell short.
The gameplay became tedious to the extent that I didn't even feel like trying to see what neat little things each century had to offer once I got to that point where the gameplay became stale. The controls WERE highly responsive, but there was no pattern with the randomly generated shapes which made the game that much more harder to play.
If this game was solely made for the challenge alone, the score would be higher.
(The game should have a difficulty meter which affects the number of checkpoints or something.)
On an artistic value, the music was nice and calming, but the sudden and common pauses from jumping completely ruined the flow of the game, and the ticking noise from jumping got more annoying with each jump.
I feel as if I missed out on a LOT because of the difficulty curve of this game, and the curve was just something I was unable to overcome. I'd suggest adding more century themed stuff, and less shapes though.
With all this in mind, you have the makings of a good game, and only a few tweaks would really be needed to make it an AWESOME game. Sorry if I'm coming off as a bit harsh, but the game really was a lot more difficult then what it should have been. This makes it fun for the gamers who like a challenge, but pretty much kills it for everyone else.