Very nice game with the simplicity that a flashgame needs.
The concept's extendable, yet good imo.
What I did not like about was the roll over.
It was hard to roll over falling coins.
When I paused the game and bought upgrades I accidently restarted the tutorial, now there was this "start game" button and I was not sure if it would restart the game.
Maybe "go to house" or somethign like that would make it doubtlessly clear what this button does.
Other things that come to my mind:
WHO is WHY throwing bombs at a house with ballons?
No birds in the sky?