Man I'm inlove with this gameee, but i do have some suggestion that you could improve;
Increase the types of enemies - most of the enemies are made of goblins soo yeah might add some others mob and man meeting the slime king frequently in endless mode is just Urghhh... ( i hope you add some aoe weapon or spells)
Increase the events that could help reduce your weight - I only relying on the fairies food at this point to reduce my overweight well at least the odds in finding the fairy is still great i guess.
Might just add different boss for each 20 floor in the endless mode - just give the boss different abilities or behavior that improve each 20 floors (like each 20's give the boss powerup such as increase her minion or reduce the effectiveness of spells and such...)
Also, does the mana stat have any function? I have increase it and use the shard as scale to see if there is any difference - welp there's none soo might aswell improve that
Overall this is such a fun game with lots of possibilities. Major congrats for the developer and i look forward for the next update!!
P.S. I'm currently on 51st floor and I will get my ori weight back (From 356 > 296) ain't gonna stop the grind anytime soon he