Nice game.
It has good potential and certainly a lot to explore with the open world.
Some improvements coould be the following:
Have a pause menu for mid-game. I played it on the web but when pressing the ESC it didnt work (maybe wrong on my part)- I feel like the game would play much better on fullscreen, right now its on fixed size and some UI elements are off screen.
- The open world looks promising, but it requires a lot of polishing and better optimisation.
- Some sounds should be made to propely fit certain elements. The footsteps didnt much that well or there were delayed sounds effects when opening doors.
- It should be a little more clear on what is interactable in the world what not. I go to doors that can be opened and than go to another door but cant be interacted or no message is shown (maybe add like a "it wont budge" or "locked" message/UI notifier)
Overall, its a good game. I understand you are only one person who made it and it is hard to make 3D games on your own within a specific timeframe.
As one of the comments pointed out below, if you give it another week of polishing and some extra improvements it could be really :D
Keep up the great work!