Thanks for playing and thank you for the in-depth feedback!
The enemies do actually scale for each gambling phase you entered, but I think it is a little unforgiving in early stages right now if you don't get the best weapon upgrades. The bugs you have mentioned are things we have been struggling with but sadly didn't get time to get just right before the deadline, which of course is a shame.
Again thanks for the feedback. It is very valuable in case we decide to make a post-jam version some time in the future :).