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.