I couldn't seem to figure out what "order" I was supposed to catch the balls in. It felt like if I caught a dark ball, it'd take a life, and if I avoided it, also take a life.
Without figuring out what I'm supposed to do with them, it felt like the game just was "play until you miss enough light balls (fine) or until three dark balls spawn (frustrating)". Certainly unlucky, but hard to play more than briefly.
Conversely, the sound effects and music fit in nicely, and the graphical style catches the pea-soup feel of original GameBoy. The balls spun a little when bouncing off the basket, and as far as I could tell, correctly nearest-neighbor rotated to accomplish this.