Hello everyone, I create game assets and would like to ask a few questions to make them more convenient for game developers:

1. Is a PSD file enough for you, or would you prefer if I save everything as PNGs with all the items included?
2. Should the items be placed as close to each other as possible, or do you prefer them at equal distances from one another? In the latter case, the canvas will be much larger, I think.
3. Is it important for you to have variety in scale and color, or can you adjust those in the game engine?

Thanks for your input!