My new outdoor tortoise house

[K.J]

I've just finished building a new outdoor house for my Hermann Tortoise. It has an Arcadia D3 combi bulb and tube heater for ambient temperature. As its my second effort at building a outdoor house, I learned from my mistakes first time around. One thing is that I built it off the ground as the old one used to get wet on the floor when it rained, in heavy rainfall it would be saturated. I've used the door as a ramp and there is a step up. I've added a removable ramp but she doesn't seem to want to go down the ramp, even this afternoon when it was really sunny. She poked her head out and went back in. Do you think it's too high?