Visual Update

1. Increase the map size

- Now it seems BIG.

2. Change background color

- That change the game's mood.

System Update

1. Player's coin system

- I think it could be useful for later.

Stat Update

Pickaxe

- damage : same

- cooltime : same

- attackarea : same

Hammer

- damage : 2 -> 1

- cooltime : same

- attackarea : 12 -> 15

Big Hammer

- damage : same

- cooltime : same

- attackarea : same

*Trolley Stat

Speed : 5 -> 7