Level 4.
The game's idea is really creative, however there are very big issues with the current state so I can't say I enjoy playing it a lot.
1) No tutorial, yea that pretty much speak for itself.
2) I saw on the discord server that you mentioned you broke the wave system, yea this wave system is beyond broken at the moment, it's practically impossible to plant anything after the first 15 second so, that's like the major point of the game just out of the window.
3) The gunplay is very doom-like, which I actually quite like, but it lacks several quality of life features like bullet count etc
4) The worst part is that you need to pick up the coin on your own, at that point you are already jugging like 18 balls at once in the game, and the collision on them is wacky, I couldn't even quickly run by and pick them up because E just doesn't work unless I stand completely still and aim straight at it.
Really it just boils down to the gameplay curve being worse than COVID-19's curve, other than that, I think the game have some pretty solid foundation for a good game in it.