Cubes Shop

This is a shop in level A. They sell cubes:
 * Blue Cube - $1
 * Green Cube - $1
 * Red Cube - $2

Through the additional door there is:
 * Cyan Gunman - $1
 * Red Gunman - $6
 * Purple Gunman - $12


 * Cyan Dog - $1
 * Yellow Dog - $15
 * Green Dog - $20


 * Save Room collector

Behind 3 walls of bricks (requires explosives):
 * Virus block? - $1