hahaha yeah... I am no artist but I cobbled together what I could. "Existent" was the art/sfx brief.
We actually discussed the idea of moving turrets back and forth a lot, but ultimately decided it trivialised the scaling mechanic which we wanted to be the focus.
I agree that it feels bad to be limited by placing towers too close to the path (which is what you do in normal tower defense)
Re tower count, you just get an extra slot every couple of waves.