Nicely done, simple but work fine aside for the bugs that others have already pointed out.
I'm glad to see that I'm not the only one that add another personal challenge using the free version of C3 that is quite limited, so I understand how 50 events and other limitations are quite hard.
If you polish the game and add more power ups and levels, you can monetise it on game portals (make sure that before do that you purchase a C3 license though if you don't have one.
Well done.