It's genuinely not fun.

Kill enemies, get money. Come back to town, put money in storage. Buy weapons or upgrade stats. Storage space for gold is small, so running back and forth is annoying. Guess this is the style of foreign mass-produced games. There's a lot of inefficient movement and wasted time. Most of the playtime is spent traveling. No content, no presentation, no story. Ads seem to pop up every minute.