Indeed, it's a bit sad it works only in chrome.
Indeed too, the disappearance of the map on explosions is a bit too much. There's a lot visually going on, this effect is too much.
The render on the tiles forming and sizing as you move on the map is pretty well done, and visually pretty pleasing. This has a lot of potential as a visual hook.
I'm not too fond on the sound of the explosions (too deep, too much, once again). A much quick/stiff explosion sound would be better.
Explosions are your main mechanic, you can't make all of them a full visual/sound/etc... blast, it's too much for the player.
I played 10 minutes, I'm tired already :)
Another thing is about the main menu and the "control window".
You have to click on the menu to launch the game and you have to click on "play game" to play.
It would be better to have a keyboard control over those elements too (especially the "play game" window).
But a good job already that previews an excellent game. Keep it up.