Its a rather good game, I quite liked it. I played and got to 160,000 feet or so, and decided to stop being addicted. But theres nothing after reaching deep space, and becomes a little pointless. I suggest perhaps adding little differences in the background like little galaxies or something, to give more incentive to go much higher than deep space. Or perhaps a wormhole or something far into space... but overall a great game.
This is a great idle game. Thanks for making it ^_^ Its a pity theres not more high level things to buy, but I await your new games with eagerness, which will obviously be enjoyable, seeing as how this one is. If you do decide to update more, I agree with the backgrounds idea. Good luck on your games ^_^ Full speed ahead!