I think that your modifications are headed in the right direction! I do have a couple questions:
- When you say instructions, are you thinking of adding a tutorial level, or altering the text for instructions? I would advise the former, as it may not be significant enough to alter the instruction text - but a tutorial level could be very beneficial to players!
- How are you planning on differentiating your new level from existing ones? What types of obstacles and challenges will it have?
- What's your new game title? How are you planning on changing the mood of the game? Will it be through art, sound, design, etc.?