If someone is into "how the brain works", the funny-ish part is that when I play along (by ear) to some of the stuff I listen to (very ecclectic, but not trying to play along to jazz or classical), I'm generally not struggling too much. Or maybe I'm just totally off :) ! Damn...

Agreed! The bass note isn't reliable as you've described. Listen out for the different relationship of IV to I, and V to I. The IV chord wants to resolve back to the I chord, but not as strongly as the V chord.

the game is made with that added layer of difficulty and yes the bass shifts as you describe, over time if you promise to keep training with it you're guaranteed to get really good with that game, it's a promise!

"Guaranteed to get really good"

That's what I need to hear. That's the kind of motivation that really sticks with. I hope that we all become as good as we expect.

It's learning a new language, with more repetition, your brain will start to make better associations with what you are hearing, but just with anything, you have have to practice and put in the time. As noted about the relationships and the IV and V wanting to resolve to I (at different intensities), one thing I have been trying to do is "feel" the chords. Like there's a strong outside "feeling" of the V and it really wanting to move to the I as its next step, the other chords will also have certain feelings within the context of the key. A lot of times I'll just noodle on the piano playing all of the chords in a key and playing each one against another to try in internalize what that relationship feels like, then it will be about how the whole chord feels (as a whole) without having to necessarily root out any specific note (like whatever the bass note is that is playing, which will likely be less and less the root of the chord as you level up)

What do you guys think about that part tho? It's sort of something I'd really like on multiple exercices here and on SoundGym also:
Maybe It'd be cool to be able to re-listen where you stuffed up, with the answer exposed, so you can analyse your error?
As in have a button to move forward to next question, kinda like "EQ mirror" / "Balance memory" etc in SoundGym where you can re-adjust your settings after you submited but before moving on to next question... On "Scales" , "Intervalis", here...

@Mr Presqu - I definitely think it would be great to be able to review any answer you got wrong, ideally right then and there, but maybe as a report at the end of the exercise if that disrupts the flow of the exercise less

@Mr Presqu Hey,

There is a button that you can click during 1 second after you give your answer. It will "freez" the screen and allow you to re listen each possible answers.

I hope it will help !

Yes, that button (lower right, or C key on your computer keyboard) is very helpful to me as well, as i keep completely messing up this exercise. Every time i think i got it right, it's wrong again, my brain is a total mix up, not sure what i am hearing. I agree with Mr Presqu that the bass pitch is making it very difficult to distinguish what you are hearing.

Thank you @Goy Jordan and @Adrian Kolsters!