MonYuu Demo (Quick Look)
Channel: Game Journey
Date: 18/06/2021

Full title 『モンスターを倒して強い剣や鎧を手にしなさい。死んでも諦めずに強くなりなさい。勇者隊が魔王を倒すその日を信じています。』
 “Defeat Monsters to Get Strong Swords and Armor. Even if you die, don't give up and get stronger. We Believe in the Day the Heroes will Defeat the Demon Lord”. 

I got to the boss since making this, though I haven't managed to beat him yet. The only other things I noticed are:
- There is a maximum to how far your HP/MP are boosted from dying
- The max level is dependent on how far into the tower you are.
- There are "Gold Bugs" which have an audio cue, and are hidden in walls. They are traded for rare items with the barkeeper.

Nintendo Store Page: https://store-jp.nintendo.com/list/software/70010000038412.html
Gamefaqs: https://gamefaqs.gamespot.com/switch/316074-monster-wo-taoshite-tsuyoi-ken-ya-yoroi-wo-te-ni-shinasai