Congrats on beating the game! :)
Thank you so much for playing and your review! I am glad you enjoyed it.
The "Go to the next floor" is a bug ... ahem feature ... which I did not manage to fix until the deadline :D (and still wasn't able to find the issue, though). I will deal with that in later releases.
Also, the transparency issue with walls will be tackled for sure. It is one of the things I got accustomed to, but is a struggle nonetheless.
Regarding the ammo question: while the ammo type is random, you're more like to find ammo for your current equipped weapon. Something around 50% chance to find the "right" ammo.
Meeting the boss after having Satan rip off your health is brutal. But it's all about consequences, right? ;)