I've played through this a few times, now. Admittedly it was rather fun! it's a small environment, but it's busy and challenging and you get the planned intention immediately. For a learning game, very well done! Styled and plays in a fun way!
As for a couple small constructive critiques, very minor things.
Camera:
The camera turning was a little slow, and the lack of vertical motion felt restricting. Also, if you could move the camera around while the ball was in flight from a previous shot, it would make for smoother game play. The feeling of being able to prepare or stay aware of your surroundings lends itself into a more engaging and strategic play, and that makes the replayability higher.
There's also a little confusing bit where the wall disappears when youre viewing behind the wall, but the Houses around the map don't, and it causes the screen to go black.
Game Play:
Game play itself was simple, but it was rather fun! I played through this a few times, always getting rekt by frogs and gnomes. The only thing I missed in game was maybe a description of the power ups when I hovered my mouse over them. I could guess by using them, but it would feel complete with a small description when hovering over the choices. Graphics, physics, style, and gameplay felt great! A few more satisfying sound effects when the ball hit the gnomes and frogs would have felt amazing, but it wsn't needed to play it effectively.
Overall, great start! Great fun for simple concept, and I really wanna grind and see how far I can get!