Damned good game. Great tutorials, clever concepts, and it never got ridiculously difficult, which is a major problem with puzzle games. I would have liked a way to tell when the ball would just fall straight down vs. when it pops in and out of the portals, but that's the only flaw I can think of. 5/5.
I played it over at Newgrounds, and assuming this upload isn't especially different, this is a fantastic game. I liked how there was no blatant tutorial telling you things like "The purple vials are only collectible in the sci-fi world, the burning keys are only collectible in the fantasy world", stuff like that. It was fun to figure it out on my own. 5/5.
Takes way, way too long to earn up enough money to buy your way into the good part of the game. Sure, it's okay after you get the bat, but the initial buildup of mediocre jumps over and over just kills the game. 2/5.