After doing a little testing, it seems that defensive items have no effect on the AI monsters' attacks. This was probably intentional as the monsters don't have any equipped items and would make the game too easy, but it would be nice to know beforehand.
Hi Mantis660, we are still working on balancing some of the stuffs and we will tweak as we go along. =D Thank you for your feedback and it has been noted by us! - Haruki
I believe a solution to the progress deletion problem could be solved by uploading the status of the game to the cloud in the option menu. It seems to be working for me so far.
One bug I've come across is when a card is upgraded, it does not display the upgrades until the page is refreshed. Another issue that I believe to be a bug is that some bosses won't appear on the defined end of normal dungeons and continue climbing past the floor limit (Catch the Cat and Vampire Lords.) The latter issue should be addressed asap as it is not explained in the help menu.
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Hi Mantis660, we are still working on balancing some of the stuffs and we will tweak as we go along. =D Thank you for your feedback and it has been noted by us! - Haruki