Is it solely on the OP to improve it, or is it okay for others to attempt to fix it?
You are fine to improve a question that is not yours, but it is important to ensure such edits are an improvement, and that you still retain the core intent of the question. If the original asker decides they are unhappy with your edit, or other users decide your edit is not an improvement, it can easily be reverted; Assuming you did make the edit in good faith, it's no biggie.
In situations of blatantly off-topic questions where the user has made an effort in their attempts to ask the question, I would consider making more drastic changes, in an attempt to convert the question to an on-topic question that might still help the original asker. In these situations, I always leave a comment explaining why I made such an edit, detailing how the old question would be closed as off-topic and how the new question should still help the user find the information they were after.
What, if anything, can be done to better align it with GDSE?
From what I can tell, nothing.
At the end of the day, the question asks "How can I improve the chances of being approved for Steam Greenlight". This raises two flags:
- First, we need to advise the user in how to get "greenlit". From what I can tell, this is some sort of popularity vote. While there is a concencus across multiple articles that popularity does have a big impact on who gets greenlit, there is broad speculation on minor impacts, such as how Steam manages their traffic to your site and how Steam may randomly select games of lesser popularity. Ultimately, your opinion of the exact conditions in which a game is greenlit goes a long way towards answering "how can I improve the chances of that happening".
- Given that we can at least agree that being greenlit is greatly based on popularity, we see that this question effectivley becomes 'how do I make my game more popular', or to a lesser degree, 'how do I make sure my game is good'.
For these reasons, I think it's fair to say that this question is unsuitable for the GDSE, and does not provide room for improvement.
Well, what can I do, instead? (inferred question)
The question should be closed, but if the intention is to help the asker, there is certainly alternatives to consider.
- Comment on the original question and advise the user to try voicing their question on a relevant forum. Forums are generally far more flexible in their governing rules, and such questions are often welcomed. Furthermore, forums support greater dialog between individuals, which might allow for greater feedback.
- Comment on the original question, advising the user to try voicing their question in our chat room. This will still require the user to achieve a reputation score of 20 to unlock the "talk in chat" privilege, but I think it's fair to expect at least a little effort on the asker's behalf.
- While I do not agree with the inclusion of the asker's Greenlight page, as it only serves the purpose of advertisement, there is nothing stopping you from visiting the user's page and checking it out. Vote on it, comment on it, if it's good, tell us about it. Just not in a question format.