Love the yard. Not easy to deal with given the slope but the terracing and rock walls are great, as are the compost bins (I will not now show you my compost "bin" which is just a pile).
No one will be surprised when I say "lose the ramp". They don't need it for that "hop up" distance and you don't need to clean poop of an unnecessary "accessory".
I will suggest (as will others) that you need 1/2" hardware cloth up a couple of feet along the (nice size) run walls and buried down and out 18" under ground to keep out digging predators.
Where are the nest boxes?
Are building materials so expensive in Finland that a sheet of plywood and some 2x2s cost 45€ ? Ouch.
I was going to ask how the rabbits get up onto the shelf but my wife said rabbits jump REALLY well