I feel like a good 50% of my time playing this was loading screen, which hurts considering how small the levels are, it doesn't feel like it should take that long to load. Also not a fan of pushing a button to use the elevator, and not using that button at any other time.
But like, good show. Less than 10 minutes, so I can say it was time well spent. You took a concept, you made a game, and you didn't drag it out. Plus you put it out there for a good cause.