Very good
And I mean it.
A mix between space invaders and wallbreaker can be a nice idea. But like those two original games, it should have a limited interest, particularly when you take the very first version of each, with no power-ups. And as it should have a limited interest, the player should got bored fast.
But, obviously it's not a single mix. And 2 colors give this game its savor and its consistency : those missiles that you can reflect constitute the essence of this little game, and make it definitely addictive.
It force you to distinguish and to treat independently those two kind of missiles, to develop a strategy (yeah ! a real strategy), particularly to win the hard medals. (unfortunately the last one popped up on the screen but i didn't receive it ?)
The idea is really great, and it's perfectly realized. Controls are so simple and effective, the sensibility is perfect. Graphisms are epured and primitive (in a good way) and don't spoil the visibility needed for the missiles.
Simple but very ingenious, and made with intelligence. I had much pleasure playing this game.
Just one thing : I guess it can get boring as soon as you've reached all medals. Particularly for the first mode, cause it gets repetitive and doesn't really push you to try to play for score. On the contrary, concrete objectives are really motivating. Maybe incorporate them in the game would be a good idea.
Well done !