Designing puzzles and rooms
Me and the other designer divided the game into parts and from there we designed and thought out puzzles that we then pitched for the rest of the team. The beetle was added to show the player way's they could go by lightning up the letter depending on which way the player could go.
My favorite puzzle is when the player enters a room with a tomb in the middle by inspecting a statue next to the tomb the player discovers a room hidden behind the statue. In the room the player finds a corpse with a dynamite the player takes the dynamite and goes out from the room and blows a hole in the wall. A huge crack in the Tomb room gave a way the clue that the player could break the wall and by inspecting it would hint about some way to blow it up.