Hey! Thanks a lot for your comment!
I have a couple of ideas regarding what could've happened there, but as usual, if you could please check the logs and tell me if there are any errors - that would help me immensely (I had an instruction on how to see the logs in my answer to the comment below).
Regarding "Abandon Run" button - it is in my to-do list, and will definitely be there in the final version of the game.
The inability to inspect items that are on the ground is by design - I don't want to give up too much info about the item before you pick it up, so I think that seeing item's tile is just enough. But as for dropping the items - you're certainly right, its a much needed ability, and you know what? I have just added it this week! It will be available in the next build, which comes out next Sunday.