Hey, thanks a lot for testing the game and sharing your feedback!
The aiming issue near the sides is useful to know. I’ll take another look at the reflected trajectory, especially when aiming close to the walls and corners.
The early difficulty curve is intentionally quite gentle. The difficulty starts increasing slowly after level 10 and becomes more noticeable after level 20, so level 12 still feeling similar is partly expected. Still, the increase may be a little too subtle during those early levels.
There is already an automatic fast-forward when the balls keep bouncing without hitting anything for a while. The button also appears if the shot continues for around 10–12 seconds. I kept it hidden at first because I wanted normal-speed hits to remain readable and didn’t want the UI to feel crowded, but I understand why having it visible all the time would feel more predictable.
I also agree that the main menu could communicate its flow a little more clearly.
Thanks again for taking the time to play!