I appreciate the incremental game concept very much. However, there is much to be desired for about the pacing of the game. The premise of incremental games is that it should provide instant feedback and satisfaction. The pacing of your game right now doesn't achieve that, unfortunately. It just takes too long to save up to buy the first upgrade, and it feels way too long to buy the next one.
I think if you can solve those issues then it could very well be a good game.