Making quality games is a satisfying development experience for me.
Each game should has a good connection between story and game mechanics. I design coherent gaming experiences.
I can obtain the graphics using my connections or work with the graphics supplied by you. I can adapt the graphics to the game on my own.
To create the playable demo of your game I will eventually code the most of the game mechanics and screens. So milestone costs are reflecting this situation.
When a game design document is supplied I can implement it as a game. I can also write a game design document for the projects.
Sounds can be found as CC0 or royalty free. I can mix and merge them to get the desired results. They will be handled by me as well.
I am using Godot Engine which is a very capable engine that have seamless publishing capability for both iOS and Android. Also all PC platforms. I have already developed games on godot engine.
Note: You can see https://godotengine.org for the capabilities of the game engine that I will use. Also game studios and teams already using it.