I will write a script in C # for Unity3D. Experience with Unity3D 2 years.
I can add various components to the base script (Particle System, RigidBody, Collider, etc.).
It is possible to integrate ready-made, provided code into the ordered script.
Controller - buttons, mouse, touch.
There is experience with shaders, materials, prefabs, profiler and other Unity3D tools.
You will receive a code with comments on its work, with convenient functionality in the inspector window and without bugs.
The execution time may be less, depending on the functionality of the script.