This is a puzzle game, so you have to think about how you can expand the most from your base platform, and then the action come when you are trying to implement it.
I didn't put any timer because this is artificial, and I don't want to stress the player. Max score is 900, can you reach it ?
By the way I put the US keyboard layout and some other key and gamepad in 1.2. Thanks for your comment.
Ho and you will get some sound if you reach 100 :)