Woah...
I can't think of anything I didn't like about this game: the graphics were amazing; the gameplay was original and fun; and the music was dramatic and fitted the game well. I especially liked the way you showed the change in time, in fact it was so effective, I don't think you needed the dates popping up on screen to tell you when it was.
I liked the way you stylized the different time periods (E.g. the Da Vinci type helicopters earlier in the game and the steam powered flying machines in the Victorian part) it meant you could have a wide variety of enemies, without any of them looking out of place.
One small flaw (which doesn't really detract from the gameplay at all) is the combo system, it gives you the ability to pay money to make custom arrows, but you can do the same thing for free by clicking on two different arrows during the game.
Overall, this is another great game, and it is certainly up to the standards of your previous work, despite being very different indeed.
P.S. Any game where you can turn your enemies into glowing purple dinosaurs is a masterpiece in my book.