This was way fun! Especially when the cannon guys would blow up a bunch of dudes for you.
It was a little frustrating when hugging a wall to the right of the wizard would block projectiles from them. It didn't feel intentional, moreso a bug.
It did feel very difficult. Maybe adding enemies of lower tiers to get things ramped up? Like a slower melee guy, a crossbow that fires one projectile, etc. I want more levels and content, damnit.