What a positive comment! Thank you so much. Your kind words really mean a lot. The environment is a blend of the 3D skybox and trees. You can clearly see the walls are 2D items and the rest is 3D objects. I guess feeling trapped is one emotion the player experiences, although my main goal was for them to feel very uncomfortable, the reason why I chose the setting to be bright, during daylight and not generic night time - also, logically, no one visits people at the cemetery during the night, ya know.
As said on my profile and also in the game, once you open the application, it is made with Copper Cube 6. It is a decent engine, which does not get enough credit. In my opinion, it works fine and keeps my work more imaginative and more or less original.
Hope this answered your question. Cheers!