Thank you for your fast response. Unfortunately I don't have any mouse with middle key around. :( I will wait for keyboard controls for that.
The idea of your game seems to be very good and relaxing.
For most of the incremental games, the prices of assets are increasing. They are usually something like: first new object is X, second existing X*(1+p), next X*(1+p)^2, and so on. This makes the game more challenging. You begin with little amount of money, building first takes some time, but then the game become easy. And after some time (and building more objects) you need much more money than it is available, and your progress is slowed down. Current state of your game is that starting is a bit challenging, but getting to know how to solve making money, you gain more than you can spent.