I need someone to help me with my computing project

I'm trying to make a little mobile app that tests your knowledge on projectiles in M2. I want the user to be able to choose one of three difficulties then the program select a random question of that difficulty which will be displayed to the user. The user will then be taken to the "game" where they can input the value of initial velocity, angle of elevation or distance from target then when they press go a projectile will be launched towards a target following the correct flight path using the suvat equations. If they have inputted the correct value it will hit the target and a message will pop up saying they are right.