i hate to say that Nerdook but though i loved all of your other games, i was very disappointed with this one which is in my opinion a second-class version of a classic game mode. It is mostly grinding and very repetitive. Though i imagine it was designed quickly for mardi gras.
needs a speed up button, and a better upgrade system along with some balancing, as loads of ppl have already mentioned. Otherwise quite fun 4/5 for your ideas (nice princess!)
the problem is that when you aim it misses most of the time for no reason, and if u just click click click on the middle of the screen you win the game easy. Very nice artwork though