Technique very technical ...

Contrary to what is written on the description, the game is not intended for children 8-15 years but not more than 15 years. Once it attacks the mounting, we understand why it is extremely difficult, the main entry is in English and is accompanied by a second in poorly photocopied French.
Result for my 8 year old daughter, it is I who has spent many hours mount, this being, it's exciting, luckily as I am an engineer, it helps ....

Once the numerous settings and adjustments made, we delight to see the balls do fairly perilous journey.

So good luck to future buyers ...