Hey there! Thanks so much!
On the topic of polish: When you focus on it, and not just touch it up as you go, it's relatively "easy"! Spending an extra 2-3 hours on making something feel "perfect" is way more time efficient then spending 5-10 minutes a day tweaking a bit, and that also leads to tweaking other related things, and when you are tweaking core gameplay mechanics every other day, it can snowball out of hand.
Spent a week making the player actions feel right - move, jump, fall, idle, glide, attack, dash (dash is not in game but fully coded) etc. and then You can focus on putting in content and polishing assets!