Fascinating little game here! Admittedly, I've never been too great at older games in general, but hopefully that doesn't matter too much.
I find that the sprite-work here is really impressive! I appreciate the amount of detail you were able to put in these without over-complicating them! Additionally, while its literally a game about a fox girl laying eggs, it doesn't feel tasteless at all. I was worried that would be "all there is" for lack of a better word, and while thats not bad in theory, theres a specific audience for it that i may not be a part of. Luckily for me, the game stands extremely well without that being the main or only draw to it. The music also never really got old, even if it is stuck looping in my head right now :P
My only real bit of criticism is a few bugs i ran into. Twice, i got caught in a state where poor old Fox Sprite was stuck facing to the right, unable to interact with anything, climb, or attack, unless she gets hit again.
overall, im interested to see where this goes next!