Oh yeah the crafty farm sims player love customization glad you got it in.
My personal wishlist is being able to customize a lover npc but I dont know if thats a shared interest. My own up coming farm sim + town builder has that planned for it.
You got the monster collection thing cut out for you, best stay to that. Monster taming is a huge feature. I know Moonstone island got that too and maybe you can bundle with them if you ever get on steam. targetting mobile is a great idea though. I personally like monster tamming just dont really want to do monster fighting when it gets to farm sim, I want to just farm them like pets. Hope fighting is optional in yours.
I will be keeping an eye on your updates, after playing so many farm sims I now have a preference for pixel style farm sim way more than 3d. 😄
Also if you can do the stardew ASMR magic with sound effects and music activated by player clicks *which you kinda got already* you will catch us in it for a long time with progression depth.
Best wishes!