The main mechanic is nice and feels very natural, and the whole thing is very relaxing! The music is very pleasant, but I'm guessing from your comment above that you didn't make that?
I had to read the comments to find out I needed to press space. Is that mentioned somewhere and I just missed it?
It was a fun, chilled little game but my only problem is it didn't really pose any sort of challenge - once I'd realise it was the space bar I was after, breezing through the one short level was done in no time.