A garbage truck is a heavy transport, yet a simple car can push it around without any problem. I personally find it weird and think small cars shouldn't push the truck around with ease.
Sometimes the Sir Sword will drag your maces, causing them to be unavailable, or enemies, causing more possibilities of taking damage. If possible, the sword should just have the damage hitbox instead of collision hitbox, so that you don't cause any troubles to yourself like that.
I found a bug: if you don't press the W button at all, no matter if you die or stay alive, the game still will count the challenge of "not moving forward for 3 minutes".