Well let's start off here by confirming that you should absolutely go ahead and send it on Part 2 - this was a great hook and I'd love to see it concluded. That said, these are always tough to judge for the jam. What's there is good, great even at times, but it's hard to evaluate something as a story when only half the story is there and the VN practically cuts off mid-thought.
To the extent that we can though, let's get into it:
Implementation of Theme:
I mean... kinda? There's at least a reference to "The Boy That Cried Wolf" towards the end of the build, but there's not really much building on that here, at least not yet. You have a comment response below stating that there's supposed to be more building on that theme in the back half of the story, and yeah that makes sense for sure, but as far as assessing what's currently present in the text, it's a bit sparse. I think the idea, with the focus on lies, is that Ren has an MO of baiting and blackmailing rich people for their money. They lied to Tom, and they lied before Tom, but are they lying to Lucan? Or is the "wolf" really there this time? Maybe I'm losing the metaphor, but, like, I can see it, it's just not all there yet.
Presentation:
Art and sound are pretty good here! The sound is subtle, to the point where I wasn't noticing it much for better or worse, but I never felt taken out of a scene by misplaced music or awkward silence so that's definitely a positive. There are a few different art styles at play here and I think they're all effective - the sketchy closeups for Lucan in the intro and Ren in the alley, the sudden shift in palette and detail when Ren realizes they're with Tom, and the softer sorta watercolor-y (I am not a visual artist and it shows, I'm sorry) sprites for Ren all do excellent work in conveying tone and the general unease that permeates the VN.
Text was a bit more hit-and-miss here. Quite a few typos, mistakes in names (the Lisa/Jane one is big, but there's also at least one line that's supposed to be Lucan's that's attributed to Ren), and some really inconsistent uses of quotation marks in dialogue (including at the end of narration lines for some reason?) suggest this definitely could've used another proofreading pass, but I also understand that getting things polished on jam timelines is difficult, especially when the story itself isn't even done yet.
As others have pointed out, this VN went a bit overboard with the mid-line cuts. I was a bit confused why the default text speed was set so slow, but maybe that was why. Regardless, those quick cuts can be effective, but are most effective when used sparingly. The number of times this was done here got a bit tedious, and for some of the occurrences I'm not even sure why it would have been used. Like why does "I stand up too." need to be a quick cut? Might be worth pointing out that you can indicate someone is getting cut off in conversation by just adding a dash or something rather than using the actual Renpy modifier, and you can save the latter for particularly important sequences.
Story/Writing:
Like I said at the top, it's a bit hard to talk about since we're still firmly in the rising action here, but it's certainly a good hook. I wasn't particularly surprised by the twist (I actually could've sworn the game page outright stated that Ren wasn't totally stable, but it doesn't) but the actual sequence with Tom was really well done. The sudden shift in perspective maybe could have used a bit more signposting since it was sudden and there hadn't been anything like that in the story up to that point, but the sequence was really tense and suspenseful, as well as a great character scene to show just how ruthless and manipulative Ren can be.
This is the kind of story that's just begging for a second massive curveball though, which makes this so hard to evaluate. As it stands, Lucan is a bit too empty of a character to make it believable that Ren could actually be legitimately interested in him (and don't get me wrong, this isn't a bad thing - this characterization seems pretty clearly intentional to set up Lucan as Ren's ideal mark), but Lucan just walking headlong to his proverbial and/or possibly literal death seems way too simple for what this story has been putting down so far.
There's also the matter of the title, which to this point doesn't seem to have a connection. We know Lucan is a deer and has a wife named Jane, so there's at least a possibility that there could be a Jane doe (lower case "d", at least). Of course, there might be an as yet unknown connection between Jane and Ren that could play into the "unknown person" meaning of Jane Doe. That could explain how Ren knew how to target Lucan and why they might not actually be trying to screw over Lucan the same way they did Tom. Plus Lucan hasn't known of Jane's whereabouts for quite some time apparently, and maybe that detail about Jane specifically objecting to the chocolate cake isn't entirely irrelevant. This is all most likely totally baseless, but fuck it, Ren is my Pepe Silvia now.
Creativity:
Yeah, I'd say this is pretty creative so far. There's some really interesting audio/visual direction going on here, and while the "My Wolf Boyfriend to Death" plot might not be the most original high concept, execution really matters the most on this kind of thing and this is a really intriguing start. I don't really have much else to say here; hope we get to see the rest of it.
Final score of 10 ice cubes out of 7 easy Es.