Took me a minute to understand the concept, but once I did it was a fun puzzle game. I assume when you make it outside, that's it? i couldn't figure out a way to get those coins in the grass.
the coins were kind of a tease thing. If you enter the key presses "wwssadadj" you'll get some more coins to get the last few. The concept isn't 100% original, I have vague recollections of a game when I was younger that had similar mechanics, but could find the game, so resorted to remaking a very limited version.