i left it going for a couple of hours and had like 250+ keys, and since the chest opening animation is rader slow it took a bit of mindless clicking to get fru, and i dont think it best idea to have a option for speeding/skipping the animation since it would just exacerbate the problem cause at like 1000+ keys i would still be a slog.
so i would love it if the cap for the amount of chests you could open at once was more then 10, i know that you would not really be able to see more items with the format and size of icons you are using, and if you would like to future prob a solution for like 10k+ keys where even 100 at once would be slow.
i think a good solution would be if you had more then a certain amount of keys it would instead give you the option to open them all and give you a numbered list so if you get more then 1 of a item it would just show the icon with a number indicating the amount that you got.
of cause no pressure just something i thougt would be nice if you decide to keep working on the game,i still very much liked my time with it and i have spend WAAAY more time on it then i fought i would from a incremental jam game and i think you can see that from the amount i comments i have made LOL
if worse comes to worst i could just use a autoclicker