Hi ,
I am a new member as well . Try using bass notes of chords for chord progression recognition . Playing your favorite songs or just simply the chords helped me as well . Hope this helps at least a little bit .

No Teresa nothing wrong with you, that's the natural progression, you are walking the right path, the interval games are where to start, and only much later the chord game which is advanced

ToneGym is missing a difficulty rating beside each game.

Well I have cleared the first level on all three, and I almost cleared level 2 on another just now... I just seem to have a bad ear for the C chord and lack of music theory knowledge

For music theory, there is plenty of information online,

https://www.musictheory.net/lessons

The other - it takes time to develop these skills it's totally okay just give it the time and keep coming for your workouts

There's definitely no linear path to musical wisdom. That goes doubly for ear training! Just keep practicing, we'll all get where we want to!