Took me a while to get the main mechanic, and it's a bit frustrating until you do. Even when you 'get' it, you have to look the exact opposite way to where you're aiming. Not sure how to judge my aim when I'm not looking at it. Third person might have worked better for this, perhaps?
I eventually got to the "slide" bit, and fell on my first attempt. I couldn't be bothered to find the ball, make the first tricky jump at the top of the stairs and try again, so my play ended there.
I'd have played for longer if there were an invert-mouse option. I'm really old, and the first FPS games I played had 'inverted' controls and that's just what I'm used to. In games like this, I typically end up looking at the sky/ground, rather than where I'm going. For me, not having the option to change this makes the game practically unplayable.
Still, you've done really well to get a working game concept finished in 48 hours. You should be proud of that, it's not easy!