I like the isometric game style. If you add some music the overall feeling could be improved by nearly no efford. I understood how to interact with the computer but I gave up as it was to much effort to find out how to progress for a 15 minute break timeframe. I suggest you should make the first incentivization of game progress much easier to motivate someone to come back and spend more time. Maybe it's a really good game and I gave up early.