Z I can definitely see where you're going with this. I think I might like it when it gets there. But, until then, I think the UI is a little slow/clunky. Since the bombs are dropped whereever the player is, the use of the mouse is unnecessary and adds confubulousness (yes, that's the tech term). I'd prefer to either go all mouse or all keyboard.
The player's movement is also quite slow.
Won't even touch the art/graphics since you've indicated it's still in-dev.
Good luck, though! Could be a very cool game!