thanks everyone for the suggestions,
i took the ladder that i had pre-installed and i put a flat cardboard from behind it as Ria suggested.
Im using a non toxic wood glue but it takes time to become solid
for about 24 hours or more so im gonna wait a little bit i guess...
hope that will fix the problem because im a little sad , i have put a lot of hours in building this ''home'' because of the glue i use\
I know i could use a hot gun glue but in my country nowdays things are verryyy expensive so i cant afford one right now.
But even if my hamster doesnt want to go after that what should i do?
is there a problem if i let the ''home'' there or is it gonna be a problem?
Thank you every one you are all very helpful <3.