Really cool idea, but i think gameplay can be improved.
Well, the wood should definitely attract attention to it. Current colors can not do that.
And i would really like to see robot detecting the wall while you are moving. That would be great :)
And maybe player could be just a bit faster. Not sure about this one.
I dunno these are my first thoughts. The idea was actually enough to make this game interesting, but i think that kind of stuff would make the game even better.