Thanks yeah, I've been putting more playing into and realized just recently that once you get through a bunch of waves it gets easy. You've basically beaten the game because now you get to / have to stand in the center as the enemies come more often and faster since it's easier and you no longer have to worry about losing your combo because you have ample time to take out the next enemy.
It wasn't so much a design choice but an oversight. My intention was to open up the garden a little more and be able to shoot through the flowers but there being a circular area around the flowers where you couldn't be in order to avoid this. There is even an alternate inactive control scheme where you always rotate around the center as you defend the flower.
The audio was supposed to be cartoon like but ended up not as amusing as I had hoped.
Thanks again for your terrific feedback and for playing!