Since it isn't obvious at first to everyone :
It's important to use multiple clicks to change the trajectory of your ships after the initial launch.
Scoring is based on hitting the bulls eye of the target, collecting the coin, and getting par or under clicks for the current level.
There is a downward pull for gravity except on the summer season levels.
I worked a long time on this game with two friends of mine, and had a lot of fun making it and testing it. Hopefully you will all enjoy the game as much as I did making it!
Edit: Oh wow! Thanks for the feature on front page! I'm sorry to those that don't appreciate the gameplay physics, we were trying to make a fun and challenging game, we figured that following physics entirely would have made for boring gameplay- but we will try better next time!