Hello Mates!
Wow, really thorough feedback, thank you so much, this is great! It feels great knowing that someone enjoyed the demo/prototype so much!
The game does get too hard on match 4/5, bu that's in part because it needs a difficulty pass once the entire progression is complete, and in part because the story has nothing else just yet so there's no real ending.
I'll also look into that bug you mentioned, never seen it before.
If I may ask just one final question - do you see potential for this becoming a full game? It is my goal for now but it'd be great to hear if others can see the vision.