Some hint here : [No spoiler]
The code for the suitcase : it's just in front of you..
The 3 shapes on the handle : forgot the symbol for now, there is 8 input with just 3 digits. the answer is on the wall and in the shape...
The code "sun,cloud, thunder.." : There is two Roman letter paper on the wall... just see the precedent hint...
it's not in english, second you don't know if thing are clickable, there is not sound when you do things.. the loop audio is good, maybe too short, and the graphics are ok too. the difficulty is fine