I can't promise a quick solution, but I'm liable to get round to it eventually. Version number and screenshots welcome.
Same issue, inventory just doesn't open at all, and moving to the next floor also breaks.
I built the Linux version on a version of Ubuntu that fits on a thumb drive. It wouldn't even run properly but others said it was okay. I've no idea how Linux stuff works so perhaps it's similar to a Mac app where it's a folder full of resources.
I can't even get Linux to work on any of my machines any more so I'm afraid I can't offer anything else. The executable did nothing other than run the swf in a wrapper. So if you can play the swf you're playing the game - the exe or app version isn't any better.
Flash has limited storage space. You have to click the flash player object on the page to open the storage settings and increase the amount of data Flash is allowed to save. I cannot do this for you, this is the price of playing Red Rogue in a browser.
I recommend downloading the desktop version instead.
That happened ON the desktop version. It opened my browser just to give me that webpage. But it looks like fiddling around in the flash settings fixed it. Just letting you know, as I said, it was the desktop version opening those pages. Took me right out of fullscreen to do so.
The game is supposed to be a permanent loop I'm afraid, the chest is only ever meant to be opened once - ever. The item inside is a random tribute to inspirations and testers, you don't need it to defeat the Balrog (don't wear his face - no really, I made the game do something ultra-mean if you do).
The red rogue wiki has all the lore: https://red-rogue.fandom.com/wiki/Red_Rogue_Wiki
If you activate Debug Mode (either backspace or shift+enter depending on version - check the wiki) you can look at the other items - but some are constructed specially. Fishbane's spear is probably the most fun, as is Mokesmoe's bug-weapon.