Improving The Emerald Isle

Hello! You know, this parking lot is called The Emerald Isle. Strange, but there is a parachute on the roof. I've finished this building, and now it's there:
1. Marker at the entrance to this building. The essence of it is that by stopping on the marker, you are teleported upstairs. How would Carl get through the whole building on the roof.
2. Elevator in the parking lot. So far, the transition from the 1st to the 10th floor and vice versa is working. In the future, perhaps, there will be a whole menu of floors (admittedly, why?).
There are 3 markers in total: on the roof, from 1 to 10th floor and from 10 back to the 1st floor.