That 'Master Ball' medal description is a bit misleading, seems like you're supposed to catch a certain amount, though you apparently just need to throw a Master Ball [Space]. It's a fun idea, but a bit monotone in practice. Seems like it'll go on forever, at the same pace, with the same Pokemon (would've been cool if you really had all of them). Highscores don't seem to be working btw. Hope you can expand upon the idea, keep it going!
-cd-
I think this could use a lot of work. It's exclusively repetitive, there's no sound, and no sort of level division mechanism. I think that this could maybe be something, but with a lot of tlc and tutorials. It's okay as a foundation, though at a very base level.
Game is definitely well made. However it gets rather boring because you only see 4 pokemon and there is no obsticles or speed change to make things more interesting or challenging.
Controls work; OK, that is something that has to work.
Apart from that; what's the goal? Yeah, it's easy to shoot, too easy in fact, the game is very slow. Just five different Pokémons? First medal worked. Second one I have no idea, says catch all Pokemons. How many is that? Because of my stupidly good patience, I hanged around making the score go over 300, which was very slow.
Even if you let the monsters just slide away, not knocking them to a ball, nothing happens. No Game Over.
Next time, a bit more effort and especially state what the goal is.
And make it faster, this was too slow.
Overall the concept is interesting, but you might want to add more Pokemon of different types and from different generations and maybe add varying levels of difficulties and also different ball types.