Hey, This is pretty good!
It's nothing too fancy but a simple concept for a game. Kinda reminds me of Bejeweled a little bit. It's a fun to play game. For things to improve is probably add more detail to it. More modes, music, maybe even a highscore. I won't take points off for the bland backrounds because it's supposed to be like that. Also that Grayble guy is so cute! He looks like a lost Megaman character! Overall, it's a simple game that's easy and fun to play.