What price would you offer for this game?

Question

Android

I am designing a future game for android, what budget do I need to prepare for this game? The whole complexity of this game will lie in the calculation of the generated numbers and in a variety of additions and subtractions of random numbers.
Interested in the question, from which version of android should be indicated in the technical specification for development.
There are also elements in the background, if they are made movable on the main screen, how much will it slow down the phones in terms of performance?