Great job
This is pretty fun. I like these types of games, simple and engaging. They're the type of games that I make.
Anyways, the game did seem to me missing something. Something that was impeding this game from being great, whereas here; its just good.
I think maybe add some monsters flying around or walking around, that, or the exploding blocks TURN into monsters. I really love your concept though, it was actually pretty impressive, I wish I thought of it. It just needs expanding on, once you add some more stuff to it, it will be front paged for sure.
Anyways, great job. PM me if you need help with gameplay or ideas.