Hey, pretty good for your second game!
The how to play on the wall was really a life saver! I really should implement those to my own games when I don't have time to make a tutorial (basically always). I really liked the models for the ice cream, and the gameplay felt polished enough.
Though I think the game gets repetitive quite fast, it was enjoyable still! The special object was implemented flawlessly, though the theme implementation could use some work. And it's quite important to make some sounds for your games, even just a background music would help a lot. I'd recommend you play around with the AudioSource component in unity, it's pretty easy to use.
Final rating: 3, 5, 4, 5, 1, 4