This game does a pretty good execution of the general combat and gameplay, being modeled after undertale ofc. Though there are still some problems with it, mainly the balancing and some underutilized mechanics.
First being items, there aren't any reasons as to why anyone would ever want to use a healing item, since the game is generally pretty easy, and you get fully healed after every battle. Makes no sense putting it in the game if it doesnt really contribute anything, undertale has a different gameplay loop, which makes the inventory system actually useful, but here it really doesnt serve any purpose. Even though surviving is pretty easy, the difficulty of some attacks wary widely, going from incredibly easy to just wth xd. The general challenge is more from how the game randomly chooses attacks that might inconvenience you more than others. This especially goes for hitless, some attacks are just plain unfair. The method of unlocking scenes is also pretty tedious (if not editing files, which a lot of others do), basically doing the same thing in essence, just slightly varied, no real changes in gameplay, same attacks. Good game tho, sprites are nice.