I really like this game! I hope it gets a remake or update in the future, because I feel it's a bit slow to begin and speeds up incredibly fast right before the end.
Collection speed (total stars per collection) would've been a nice upgrade. I ended my run with many stars uncollected due to how slow each pylon was.
Additionally, the initial housing cost is quite high. I think it'd be useful to tone down the beginning costs but the scaling late game was fine.