What a charming RPG! It seems like the battle system draws a lot from Undertale, but it works quite well here. The names and designs of your enemies are great, though I felt some of the battles (Stallawalla, perhaps) were a couple turns longer than they needed to be. Maybe I get better gear later, I didn't make it super far before dying and spawning in a black room.
I wasn't sure if I was in a Mother 3 scenario where I needed to trust and walk for a while, and I ended up coming to a cloudy room with towers and a broken heart, which looked to me like the end of your game. I kept exploring for a bit, but I was stuck outside all of the walls. My guess is that I died without ever properly saving (I entered a couple save houses, but wasn't sure if they saved automatically, I couldn't seem to interact with anything in them). Without setting a spawn point, I think I defaulted to the top left screen of your map. Walking down a couple screens and right maybe 6-ish got me to the cloud-heart room.
I think your menu text was invisible for me, too. I could see a cursor pointing at nothing when I paused the game. Battle UI all worked great, though.
Anyway, there's some promise here for sure, but there are a couple big issues you may want to address.