I could buy upgrades with no problem.
But the game freezes and the medals didn't trigger for me.
It froze with almost 10k experience, more than 1200 darts and 1065 ballons popped.
It's too easy and unbalanced, but better than some timepassing games I've seen lately.
The latest art parts looks really modern and nice. The music is good and fits the game.
I just wonder how the game finishes or what is the highest rank.