Thanks for your comment, the goal (hopefully) is to make it a proper mobile gacha out of this, so any opinion from this would be helpful.
Regarding the battle system, there are a lot more features that I would like to add (and probably would in a proper version) but I don't necessarily want to make the battle system very intense because complex stats and gameplay may be too much for some players, I am still trying to target mobile players which I believe have casual players as well.
Regarding mapping, yes it was lazy. I was planning to add some details but after like my 20th map I kinda gave up on that (did 15 maps x 7 themes, originally planned to do more). In a final version I would like randomly generated dungeons but I hadn't looked at the code for maps yet and wasn't sure I would make the deadline, so I decided to do them by hand. More effort could have gone into this, definitely.
Regarding being stale, I did get that feeling when I was doing a bit of play testing. I'm hoping it's mainly attributed to the long single paths of the boring maps. Maybe if they're a bit shorter and more spiced up it might feel more enjoyable. Endless was a feature that tried to break from it being stale (have other event modes planned but couldn't add them to this) but perhaps need something else outside of standard gameplay, will think about this a bit more.
For the overpowered chicken, in this version enemies scale in line with actors so you should be roughly the same level. However I only tested the first 10 levels and just assuming it scales correctly. I'm hoping you were underleveled, otherwise it shouldn't be that strong.