Yeah, this isn't unique, this is virtually identical to that one with the 4 "elements" as the motif, that one also had bombs not affected by gravity which you could put anywhere and set to timers of your discretion as well, I don't know what that was called so I can't put it up and find out which one had an earlier date so maybe this was the original one, but it's not really very innovative with respect to other physics games either, doesn't keep my attention.
As Xilebo said before me, it has those two. But it also has a glitch that when set the bombs to 1.8 seconds, then moved them to 2 secs, the just disappeared instead of going off.
Good idea, bad execution
Great Idea, but...
... it's possible to pull a bomb out of the screen, so you can't grap it again.
... the power of the bombs seem to change a little bit. I klicked on restart and then start without changing anything. The first time it did't work, the second time I won the puzzle.
Challenging but simple
my one complaint was that you need to do the full fledged walkthrough just to learn what different blocks meant. You probably could have just fit that into a level. Also, it became a little repetive and monotonous. I did like the "mouse trap" feel of the finished product, and it was an overall great game