Clicked help to see the instructions, but the only one you can see is the up arrow. The others are obscured by the background. Having said that, you don't really need any other key. The score also seems a bit odd - after completing level one, how can my total score be higher than my level score?
Green should come before blue and the mechanics need to be fixed as changing where the ball hits the bat should consistantly change the angle the ball leaves at.
One of the most inaccurate descriptions of a game I've ever seen.
The upgrades don't seem to do anything.
The tracks aren't locked - just click on the padlock to play the track.
I got the "All levels complete" trophy only trying 11 levels.
Some of the items on the tracks move and make it impossible to complete without restarting.
Very poor.