What I found remarkable was actually the camera angle. The over-the-shoulder angle isn’t the most obvious way of going about a game like this but it adds excitement. I was wondering why the ball wasn’t in the center of the screen at first but I see that the angle it’s at now helps the player see where they are better.
The main improvement I would suggest is to show the lives the player has in the UI. The reset button didn’t work for me. I don’t know if it’s on purpose but the obstacles don’t reset after the player dies. The doors are still open when the game rests. Maybe make it so that one button opens all the orange doors? Like the game, checks to see which door is open and then opens the next door.
I thought basically the whole thing was successful. The game feel was great. The increase in velocity rewards players for playing well while also increasing the challenge at the same time. The courses became more interesting with new kinds of obstacles as the game goes on, which is something I appreciate.
The notes I had on the improvement section I would consider minor and overall I would call this a very successful project. I think this is a very viable game concept and could be built upon to make a real product. Also, consider making each section longer so that an increase in velocity can really be felt.