A ground that could be used like a trapdoor.
For example:

[ Wood ] _[Wood ]
Trapdoor

-

When mice collide with it it automatically goes down,which will take it to another layer of ground or kill the mouse.


It would've started off like this:
[Wood ][Trapdoor ][Wood ]
And then when the muse collided it would fall.
But would it be noticable?No.

Here is how it would work:


(Camouflaged in chocolate)
[Chocolate ][Trapdoor ][Chocolate ]

But what if there was wood on one side and then trampoline on the other?No worries!
This is what would happen!:

(Wood) (Trampoline)
| |
V V
[Wood ][Trapdoor | Trapdoor ][Trampoline ]

It would still be set as one trapdoor,not two trapdoors.
I would like it if you supported!
Thanks for reading ^.^!

The format of this is confusing in my opinion, could you maybe make it simpler?

The trapdoor camoflauges.
If there is one ground on left that was wood and one that was trampoline o the right the left side would be wood and the right side would be trampoline.
Happy now?

Ahh, that makes sense.

Jake,aren't you gonna support/no support?

You know you can just use an extra ground, instead of the trap door, turn it to "collision with mice off", and tada...
Then you can just put another "collision with mice off" ground across all 3 grounds, and, voila, can't see a thing
2 Grounds if you want it like your 3rd example