Carnage Concierge [ROUGH PROTOTYPE, SO VERY ROUGH]

Ok, gonna level with you here, it's baby's first FPS, and my first 3d game period, so have mercy. This is more of a very rough suggestion of concept/prototype that I just wanted to get posted in time to submit to 7DFPS, which I'll hopefully keep trying to, y'know, actually finish.

Anyway, you're working as the only concierge at a hotel scenically located on the island of a perpetually rush hour traffic circle, you need to check guests in, and repel stray cars from the hotel. 

Move around with WASD, ESC to Quit, Interact with E, Aim and blast cars with MOUSE and LMB, SPACE to jump, scroll through your Inventory with UP and DOWN Arrows [WARNING: if you try to ,for example, arrow down while you have the last item in your inventory selected, the game will crash, I think I know why, don't know how to fix it yet though] To use a key, scroll through the Inventory until it's highlighted, then press E.

Guests will come up to the front desk in the lobby, assign them a room by picking up a key in the lobby, selecting it in your inventory, and giving it to the guest. The game doesn't have any win/lose conditions yet, but you can move around and do some stuff. Again, gotta reiterate, so so sooo unfinished. Look forward to the... more finished version, hopefully by the end of the year.  p.s. there's also an exe if you wanna download and play this, which honestly, thanks if you bother playing it at all, I appreciate it. p.p.s. those stairs to the 2nd floor are tricky, you might need to hop a bit.