Create "magnet" powerup

[Artur Sponchiado]

Magnet powerup

The idea is that by collecting the coins during the game, the player can buy magnets in the store.
This magnets can be placed in the map to pull the bullets towards it, making the life of the player so much easy (during the time that the item is active).
I think this can last about 5 ~ 8 seconds.