Preliminary: I am playing the original Japanese version. So far, the great music is carrying this, I like the platforming and everything but the jump is a bit delayed when platforming swiftly, and swift platforming is something I always look for in NES platformers! Plus, the game within the first 5 minutes has already had several moments where there are so many sprites on screen it slows down the NES lol why. why programmers. did you really not know about that? Anyway, I'm excited to see that you get power-ups/upgrades like in Mega Man and Metroidvania games to return to old areas, so that usually gets me hooked. Lol omg I was curious and exited the SOFIA vehicle and you're so tiny and cute! 
Ugh I accidentally abandoned SOFIA on a ledge to go underwater and now can't get her back? Or something? Is there a workaround for that? I suppose the fact I'm willing to start over says a lot but also, I hope I don't get burned out. Because I was starting to enjoy it too!
Day 1
Okay I'm having a lot of fun now with a labeled map (cuz it's more complex/Metroid-esque than I expected), but I've already run into 2 glitches. Like, I got out of SOFIA at the entrance to an Interior area and my character was stuck in limbo and unable to get back in. Soon after that, there was an enemy that spawned like in the ground and kept glitching back and forth in one spot lol
It seems a lot of the clunkiness in the controls is intended. Some really annoying enemy spawning in this, like you're just barely unable to see outside your scroll and bam they always spawn right there. The bad spawning happens both in the exterior platforming parts and the interior top-down parts. But I'm bopping to the music, enjoying the upgrade mechanics (upgrading both Jason and SOFIA I see), and just finished the Area 2 boss. Time to call it quits for tonight cuz fighting a cold, but enjoying this for the most part so far.
Day 2
The tacky enemy spawns continue to bog down the game, plus the frequency of the NES slowdown from sprite overload. Enemies that you knew were in your reach but because of the way the game works, was out of your "vision" (despite the level around them being visible) so that you can't hit them but of course as soon as they spawn into your "vision" they can hit you. Ooo boy and now time to backtrack from Area 3 to Area 1 in order to get to Area 4. Meh.

Welp, I backtracked all the way to Area 1 to use the Hover to get to Area 4. Imagine having to find that on your own.... like who would've thought to float up super high from the very beginning of the game? Craziness. And there are no hint-giving NPCs in this. But thank goodness for maps nowadays! Again, bogged down my the sprite overloads and terrible enemy spawns, but a good action platformer in the Metroidvania style I can't help but get hooked to.
Day 3
I'm enjoying it, but not enough to go for any extra stuff. Nor to forgive its flaws (mediocre collision masks, poor enemy spawns, and sprite overload slowdowns). But enough to push through to the end! The Sound continues to be a highlight, I dig the Area 4 jingle :--p It's pretty wild. The music itself ironically slows down (intentionally), it's almost like they were aware of the sprite overload slowdowns :-p
It's quite unforgiving with its lives, unless I'm missing some easy way to get extra lives? Either way, thank goodness for savestates :-p Pro-tip: this is water that for some reason Jason can't survive in this time, as opposed to all the other water so far. Don't make my mistake thinking there's a wall/railing against it and lose a precious life :-p (ashamed to admit I just reloaded my savestate from the start of the Interior, I always savestated at the start of each area, start of each boss interior, and after each boss) 
Also, is it just me or does Jason kinda look like Hello Kitty when turned around? :-p

I see why they changed this infamous small ladder suicide fall part for the US version, again, thank goodness for savestates when playing the original Japanese version of any Nintendohard game :-p 
The number of bugs mentioned in the StrategyWiki guide, in addition to the ones I have come across, is alarming. The Area 5 music reminds me of Zelda. And the Area 5 boss was quite cool Looking, for the most part I had only really noticed the level design/settings in terms of Look. And lol wow the Area 7 music has like a hardcore punk sound to the drums. And sheesh is that boss hard!
Well I told myself to stop for movie time but I got to Area 8 and might as well finish it. My goodness is this Area brutal. So much unavoidable damage and those frustrating slug enemies. Plus the big final upgrade I had gotten made controls more awkward, tho it was cool to be able to cling to the ceiling. Ironic it has a "body"/organic theme to the final Area, cough, Metroid. I can't imagine enjoying this without a guide and savestates, like figuring out which room to go in in that final Interior part... ridiculous. And I used an exploit for the true final boss of the game, I have no shame lol, it still took wayyyyy too many hits to kill it that's ridiculous. But, I did it at last! Great ending screen 
Look: 8.5/10 I love the menu UI and the top-down areas have a good look. The level design too. The bosses too... I guess I generally liked the Look it seems ha, except maybe the regular enemies.
Sound: 8.5/10 Like the Look, particularly good for an NES game from this era.
Play: 7.5/10 Bugs, sprite overload slowdowns, and frustrating regular enemy spawns all bogged this down. However, it's still a gameplay style I love: action-adventure, upgrades, shooting. Without savestates and a guide, I would not enjoy this as much, though.
Feel: 8/10 Start of a longstanding series, even tho I had never played any. The Look and Sound contribute to a good Feel, plus the cute Look of the main character and the name of the vehicle being SOFIA/SOPHIA (It's funny I swear this Japanese version spelled it SOFIA in the menu.)
Attachment: 8/10 With savestates, I would play this again, possibly even blind now that I know the areas you have to return to etc. However, how often I return to the early Metroidvania era, besides the ones I already know and love like the first Castlevania and Goonies 2, is yet to be seen.
Overall: 8.1/10
Completion: Main Story
Playtime: ~3h 30m