I finished the game 4-5 times and I just can't find all the crystals, I collected only 13 of 14 and the last is nowhere to be found, passed the game slowly and looked at each shelf. Who collected can help? I can write where I found these 13 Thanks for any help...

stuck at 5-9 now .. game reaches almost impossible difficulty, no internet guides, no videos, no cheats, no idea how to beat these last levels. Any tips ?

Soul-crushingly or fair? lol

When I go full screen the game moves hyper fast making it completey unplayable, switching to windowed mode fixes it, but is there any way to make it run properly in full screen mode?

There is no any data to download when im installing the game. Please fix.