It took five people AND five weeks? Ho man, you have to be new to this game making bussiness.
The models and the textures were nice, the sound design was terrible (unpleasant music for no reason, footsteps sound that resets with every keypress, completely wrongly matched sound effects for various things).
The core gampelay is as dull as it gets - you simply just walk around, at least it's not overly slow.
The level design was at rookie level - nothing smart was going on, you are just presented with doors and have to get through annoying motions to get the key. The waiting required for the obstacles to move away added to the feeling of impatience.
The game is neither fun or clever, but I hope to see you improve in the future.