Kind of addictive, but I'd change a few things. Make sure no bigger level suddenly pops up from a cloud when you're there, feels unfair. When going fullscreen, which scales beautifully, the game goes jittery, so performance optimization is needed. I'd balance the speed of the creatures as well. It would be great if you can actually catch lower classes, but given they're faster that's nearly impossible. Also, I'd suggest to make English the default language, because it's kinda hard to find the right option when you don't know Arabic / Hebrew / unsure. But, compliments you added English!