y is it hard, u have done it 70 times, good work. i got a inkling idea but depending on the theme, this could be an extra unlockable turret or only available on kongregate or armor game or where ever,
guitar turret:
it has a guitar as the top turret but and it rotates where it is shooting and its shoots little picks out! good eh? hopefully, if it doesnt fit the theme, you can always make in an unlockable
you could have little string sounds when the pick hits the enemy?
MASSIVE MODE:
upgrade the guitar to put on rock mode that instead of hurting or killing the enemies it makes them play a guitar and rock for a bit defening nearby enemies slowing them down and hurting them, the guitar player then dies
thanks
hope this is a good one!