Hey Mist, sorry you had a rough time with the game! As I've mentioned to other reviewers those troublesome carts have a nerf for it's health and speed ready to go for the next update so they shouldn't be able to blow past defenses as easily.
There was an attempt to make fast moving enemies that were supposed to make it less viable to camp at the spawn point like the carts themselves and enemies like the yellow Fasts and the green Diamonds, but it's clear other enemies like the white Ghosts and the blue Jumpers even with their unique movements still get hit pretty badly. I did have an idea where the Ghosts could already start in their Sneak state where they move faster and are invulnerable and the Jumpers could have a starting jump after spawning that moves them further than their usual jumps so they can at least have an attempt to spring ahead defenses right next to the spawn areas.
One tactic I had in mind to defeat the carts and other fast enemies were the Knife Blocks set by the dishwasher, but I think I had some folks say the Knife Blocks just don't do enough damage and so I'm gonna try to buff them after seeing what exactly is causing them to feel like they don't work that well.
I can make it so that the cart's tutorial box doesn't move with the cart after it's spawned, that can be done in time for the next update!
The "l33t" speak is actually based off of early 2000's songs that replace words like "to" and "for" with number variants as a sort of flavoring, such as S.F.M.P.'s "Try 2 Luv. U" and Naoki's "Brilliant 2U". The game's UI is inspired by this era as well, often called "Y2K" style. If this kind of flavoring is clearly not favored by players, I'm open to revert it back to "normal english".
There's plenty of core issues with the game that I think I'm starting see more clearly with all of the reviews and playthroughs I've checked out, a lot of feedback has helped for sure and it'll pave the way to shake this game's issues off, so thanks again for your honest input it helps a lot!