Not bad, not bad at all.
Not too shabby... the only thing I can think of that could improve this would be to fix a small bug/glitch where if you click once, all targets in the vicinity (within the shot target's area) also go off... bad for you if you hit a target that overlaps with a "death" target. :\
Also maybe some more types of targets, such as one that looks rather similar to the normal target that's "bad" (like the death target) since it's pretty dang easy to pick out the bad ones from the good ones. Or some effects targets such as ones that make all the target speeds slow down for a few seconds.
Got ranked 8th on my first try though. ;) <3 Woo for the gold medal!