The concept seems fine, and i would have enjoyed playing a couple of minutes, if not for the fact that it was barely playable, the mouse moving with too much delay. For how simple it is, its amazing how slow it runs, I opened task manager and it told me that it was barely using up CPU and GPU time, and it was consuming 2.4+ GB of RAM!
I have never used Unreal so I don't know if it's an engine issue, but at least I would say that it is not the best choice for a game like this. I would love to be more fair with the gameplay itself, but i just can't run it well enough,
For reference, I have a laptop with an i7 7300k and a 1050, it really should run smooth.