Interesting! But, as gromitnyc mentioned, NO SPACES should be mentioned. That is really a frustrating oversight. Lower case was mentioned in the instructions, so no biggie there.
The whole point of this type of game is to be creative with your solutions. Everyone should quit whining about instructions per level. The instructions are build a bridge using your mouse and available budget. I can understand complaints about tweaking needing improvements, and aspects of the interface, but instructions? Come on, use your brains.