Thank you very much for your comment!
You are right about all the points. I didn't have time to test the game, so I am sure it is full of bugs. It is strange that there were problems opening the doors, the collider for the X was the same, I will look into it. About X, I thought to change it to the right mouse button, but didn't have the time to do it (I used the new input enhanced system and C++). Yes, I didn't like the alarm, either, I will search more sounds and music and change it. I didn't have time to change the material for the pick ups, so I put a simple particle emitter, but between the other particles of the map, it doesn't do it job correctly. The original idea was for a big room at the end where it would be the fighting, but again we didn't have time to implement it. Exit doesn't work? Ups! I will fix that when the jam finishes. :D
Yes, normally, I use blender to do the assets, but this time I wanted to try my hand with C++, so I took all Unreal free assets I found. And those are normally AAA. It has been a very good experience and I have learned a lot!
Thank you again for the long comment! It is spot on and it really helps to improve the game.