You have achieved a lot to create so much content in such a short amount of time all while learning the Godot Engine. This game could be really fun if the combat was improved and with a bit more set dressing for the levels. Also, it is essential that you have some indication of what the controls are for the player and perhaps some story which can motivate you. I could not get the chest to open and so I could not get the silver key to open the silver door. I think that you probably ran out of time during development, but overall I am impressed with what you have achieved. Well done!