Nice job, it seems to work pretty well! I got over 1000 points and then I tried to see if you could hide from the beetles too. No luck :P
I would have preferred less lag on the "un-hide" animation, I found the timing to be VERY tight to be able to shoot the beetles 4 times. Either 1 less shot or less lag on the un-hide animation would have cleaned this up in terms of feel. It would make it easier tho, so you'd have to find a way to increase the challenge.
Overall, great job!