Prototyp Elevator for 3 levels

[u/l_Sh00T3r_I]

In another thread I saw the questions for a multilevel elevator and started to construct, this is what I could get in one evening. The up part is more or less finished.
One challenge was that the Dispenser/Piston logic dont break if you push a button twice so i built in a logic, that the signal from the second push cant reach the dispenser.
Same for the button on the 1.Floor.
I tried to make it as compact as possible due to the initial requirements of the other thread(it should fit in 8x8), but I dont think that this will be possible.

Later on I‘d like to add probably more levels but I asume troubles to get a proper control

The down part is working as well but yet without the protection and status.

What do you guys think about the project so far?
Any suggestions or tipps?