I played through level 3 before getting a bit bored. I really like the concept and I feel like there could be a solid game here, but my strategy of moving slightly left or slightly right and just standing in front of one of the other pins worked 28/30 times.
The animations are well made, especially for the pixel art style, but they take too long and end up being a bit of a drag (kind of like real bowling ironically).
Overall, this is a promising idea and you did a good job making a finished product, but I think with more time you would have a much more fun game.
Good job though!