Dunno what everyones complaining about
You did a great job! It is NOT exactly like every other defense game I've played. for one the little critters are hilarious. For two you create your own maze. For three, erm its fun.
If it is like every other defense game then why change it up? Its FUN and that s the point. If your bored of defense games make your own with these "new twists" you talk about, or suggest them in a PM or here to the authors of these plain "boring games" Otherwise stop complaining.
The only things I'd suggest is make another one with a challenge mode or something where the enemies just keep getting harder until your beat, add some more weapons with some properties like rapid fire or a poison like atribute, and maybe an extra one time use weapon that takes an enourmous amount of damage away from the enemy in case they get to the end.
Great game,
00Nightmare7
P.S. 310 on the daily High scores but 51 on the all time!? O.o