kind of simple
not that a flash game needs to be complex, but a lot of stuff was really simple. Like the repel mines powerup, it just affected them horizontally. Beside that the whole game could've been much better if you worked a bit more on the engine itself, make stuff react to each other, in stead of just moving mines, power ups and bubbles, and some collision checking. The only thing that made me vote 4 was the really funny, cheesy 'blob' when you died. That made me laugh ^^