Very engaging, innovative, and unique game concept! The way you designed the puzzles was really exciting, and it made me want to try all the levels without losing engagement. Every time, a new challenge was introduced, even though the basic mechanics stayed the same. Great job!
The learning curve was well implemented here. I never felt unprepared for the current level's challenge, but at the same time, it didn’t feel like it was the same or easier than the previous one — it was just subtly more difficult, in the perfect amount.
The sounds and sound effects really enhanced the experience, and the animation when you reach the goal or collect several boost balls was a nice touch. Despite the small issue mentioned earlier (which actually happened to me a few times too), the experience wasn't heavily impacted — only slightly noticeable when using the red pentagon, but nothing critical.
The fact that the game restarts after completion felt a bit odd, but I assume it was due to time constraints. Honestly, I’ve done that myself a few times, so it's not a big deal (especially since by that point, the player is already near the end, so no complaints on that front).
There are just two things I’d say would make the gameplay even more engaging: First, adding a direction indicator in the form of a "line of balls" to give players better control over direction/angle. The second would be a ball bar that fills and empties as you hold down the mouse button — this would show how much force the ball will be launched with.
Congrats on the game, it's fantastic. Fun and original puzzles! Wishing you success and good luck in the jam!