Welcome @ashirrwad, and thanks for starting the discussion. While I overall like mockup A, it may be too soon to discuss the design. Instead, I suggest to begin discussing the bigger picture questions, for example:
- Who is the target user?
- What do we want to accomplish with the playground?
- What features should the playground provide (you have a comprehensive list in the proposal)?
- What features to prioritize?
Look forward to the discussion and the ideas.