It's aways difficult to read between the lines on threads like this, but here's my take for what it's worth.
You're using words like "okay" and "good" interchangeably but in academic-speak they usually mean quite different things. "Okay" could mean anything from 40-59 but "good" is definitely better than that, 60-68'ish in my book. So if what you're saying is accurate, it sounds like some aspects of your projects are "okay" and some are "good" - and your final mark will probably reflect that.
From what you've written, it sounds like you've had some "lukewarm" reactions to your project. You yourself acknowledge a lack of ambition in the project (you say you played it safe) and given that approach, it might be expected that you would produce a well- developed project - instead you have had feedback that it could have been "developed a little more".
So now you are wrapping things up and writing a report which presumably gives you an opportunity to critique your project.
If you can do a decent critique (and make sure you revisit the project assessment criteria when you do this) then you should pick up marks. If there is still time to have a frank conversation with your supervisor, then I would.
You should also do what you can with the time left to make the most of your project.