This game contains two phases :
In the first part you must destroy a structure to collect as many shards as possible. You have 5 bullets to reach your goal. Aim for the lowest part to collapse the whole structure on one shot !
For the second part, it's a pachinko like game, move the container to reach the better doors and collect as much shards as possible. Be careful with the hidden doors, some hide a higher multiplier, but some hide a big malus !