I really liked the game! I actually had to finish it twice becouse the first time I just tried to remember the right answers lol, then I actually saw that you could right click to check for clues and the whole thing made much more sense hehe
The only thing I would change is for example in the pikachu one, you shoudn't be supposed to know that it wasn't made in 2004 (it can not be so obvious for some people), and all the clues should be explicitly exposed in- game only. Other than that I think with more levels and a bit more polish you could have an awesome and commercial game!