I really enjoy Yal's GM dev engines and tools. Beginner to advanced game developers benefit by how organized and easy her dev tools are to add flexibility into games.
Constructive feedback on initial release:
1) Yaru Menu Engine needs a tiny bit more polish to show examples on how to use built-in features.
a) demo on various player collision pickups going into inventory and menus (coins, sorting, buying, selling, trading, gifting) would be very helpful.
Still not totally sure how to add a currency script/flag for buying or trading items with a seperate NPC inventory/stat menu after reading through all comments in code.