Concepts there, but needs more player feedback to fully understand what's going on as it can be very confusing :)

Can you add keys in the description? I didn't know i can jump lol

Few things I would add / consider.

1. The Menu after you get hit should have 2 buttons. one that goes to MainMenu and a second button that just reloads the playable level. (Right now you have to press 3 UI buttons to replay after you fail the run)
2. When the player jumps... for about 1 frame the player is shown in idle but at no point did the player stop moving forward, looks a little strange.
3. Music
4. Possibly more obstacles or even powerups (like speed / jump boost)
5. The Player is in the middle of the screen's y position but I don't see any reason to look very far below the surface because once your down there the run is basically already over. you can probably increase the height of ball spawns to match the new height too. Something like this. 

Intresting idea

Funny idea, but a few things:

1. The jump is a bit buggy.

2. You can basically just jump and run the entire time and will not die. There's not really any skill or thinking involved.

3. The football and the rest of the aert don't really fit together.

I hope the feedback helped you a bit, it would be really cool if you could check out my submission too. Thanks! :)